[
  {"f1":0, "f2":1},
  {"f1":2, "f2":3},
  {"f1":4, "f2":5},
  {"f1":6, "f2":3},
  {"f1":"q", "f2":3},
  {"f1":"q", "f2":3},
  {"f1":0, "f2":1},
  {"f1":"p", "f2":1},
  {"f1":"q", "f2":3},
  {"f1":"m", "f2":5}
]