[
    {
        "word": "who",
        "type": "subject_object"
    },
    {
        "word": "which",
        "type": "subject_object"
    },
    {
        "word": "whose",
        "type": "genitive"
    },
    {
        "word": "whom",
        "type": "object"
    },
    {
        "word": "that",
        "type": "subject_object"
    },
    {
        "word": "which",
        "type": "sentence"
    },
    {
        "word": "when",
        "type": "relative_adverb",
        "mode": "time"
    },
    {
        "word": "where",
        "type": "relative_adverb",
        "mode": "space"
    },
    {
        "why": "why",
        "type": "relative_adverb",
        "mode": "reason"
    }
]