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                  },
                  "text": "inches = feet * 12",
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                  "text": "inches",
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                  "word": "meters"
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                    "types": [
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                    "value": "meter",
                    "word": "meters"
                  },
                  "y": {
                    "dead": true,
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                    },
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                    "value": 100,
                    "word": "100"
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                },
                "name": {
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                  "level": 1,
                  "marker": "centimeter",
                  "number": "many",
                  "range": {
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                    "start": 0
                  },
                  "text": "centimeters",
                  "types": [
                    "centimeter"
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                  "value": "centimeter",
                  "word": "centimeters"
                }
              },
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                "equality": {
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                    "marker": "centimeter",
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                    },
                    "text": "centimeters",
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                    "value": "centimeter",
                    "word": "centimeters"
                  },
                  "level": 1,
                  "marker": "equals",
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                    "start": 0
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                    "text": "millimeters / 10",
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                      },
                      "text": "millimeters",
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                      "unknown": true,
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                      "word": "millimeters"
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                      },
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                      "types": [
                        "integer"
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                      "value": 10,
                      "word": "10"
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                  },
                  "text": "centimeters = millimeters / 10",
                  "topLevel": true,
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                    "length#call2",
                    "instance4#length#call2"
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                  "value": null,
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                    "unknown": true,
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                    "word": "millimeters"
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                },
                "name": {
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                  "marker": "centimeter",
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                  "text": "centimeters",
                  "types": [
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                  "value": "centimeter",
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                    "value": "foot",
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                  "level": 1,
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                  },
                  "text": "feet = inches / 12",
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                  "text": "feet = miles / 5280",
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                  "text": "kilometers = meters / 1000",
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                },
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              },
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                    "value": "meter",
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                  },
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                    "value": 1000,
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                    "start": 0
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                  "value": "meter",
                  "word": "meters"
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                "equality": {
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                    },
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                    "value": "meter",
                    "word": "meters"
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                      "value": 3.28,
                      "word": "3.28"
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                  },
                  "text": "meters = feet / 3.28",
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                    "length#call2",
                    "instance10#length#call2"
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                      },
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                      "word": "1000"
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                  },
                  "text": "meters = kilometers * 1000",
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                    "instance14#length#call2"
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                      "word": "millimeters"
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                      },
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                      "types": [
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                      "value": 10,
                      "word": "10"
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                  },
                  "text": "centimeters = millimeters / 10",
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                    "length#call2",
                    "instance4#length#call2"
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                    "unknown": true,
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                    "word": "millimeters"
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                "name": {
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                  "text": "centimeters",
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                  "value": "centimeter",
                  "word": "centimeters"
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                  "level": 1,
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                  "text": "feet = inches / 12",
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                  "text": "kilometers = meters / 1000",
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                      "text": "3.28",
                      "types": [
                        "number"
                      ],
                      "value": 3.28,
                      "word": "3.28"
                    }
                  },
                  "text": "meters = feet / 3.28",
                  "topLevel": true,
                  "touchedBy": [
                    "length#call2",
                    "instance10#length#call2"
                  ],
                  "value": "equals",
                  "word": "="
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                "formula": {
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                  "evaluate": true,
                  "isResponse": true,
                  "level": 1,
                  "marker": "divideByExpression",
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                  "range": {
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                    "start": 9
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                  "types": [
                    "divideByExpression",
                    "number"
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                  "value": null,
                  "word": "/",
                  "x": {
                    "dead": true,
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                      "start": 9
                    },
                    "text": "feet",
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                      "foot"
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                    "value": "foot",
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                  },
                  "y": {
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                    "level": 1,
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                      "number"
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                    "value": 3.28,
                    "word": "3.28"
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                },
                "name": {
                  "dead": true,
                  "level": 1,
                  "marker": "meter",
                  "number": "many",
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                    "start": 0
                  },
                  "text": "meters",
                  "types": [
                    "meter"
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                  "value": "meter",
                  "word": "meters"
                }
              },
              {
                "equality": {
                  "context_index": 1,
                  "dead": true,
                  "left": {
                    "dead": true,
                    "level": 1,
                    "marker": "meter",
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                      "start": 0
                    },
                    "text": "meters",
                    "types": [
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                    ],
                    "value": "meter",
                    "word": "meters"
                  },
                  "level": 1,
                  "marker": "equals",
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                      "number",
                      "timesExpression"
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                    "value": null,
                    "word": "*",
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                      "dead": true,
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                      "marker": "unknown",
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                      "unknown": true,
                      "value": "kilometers",
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                    "y": {
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                      },
                      "text": "1000",
                      "types": [
                        "integer"
                      ],
                      "value": 1000,
                      "word": "1000"
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                  },
                  "text": "meters = kilometers * 1000",
                  "topLevel": true,
                  "touchedBy": [
                    "length#call2",
                    "instance14#length#call2"
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                  "value": "equals",
                  "word": "="
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                    "unknown": true,
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                },
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            ],
            "miles": [
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                  },
                  "text": "miles = 5280 * feet",
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                  "unknown": true,
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            "millimeters": [
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                  "text": "millimeters = centimeters * 10",
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                    "unknown": true,
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                  },
                  "text": "millimeters = meters * 1000",
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        "hierarchy2": {
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        "length1": {
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