{
  "question": "An airplane with its nose pointing north with an airspeed of 40 km/h in a 30-km/h crosswind (at right angles) has a groundspeed of",
  "options": {
    "A": "30 km/h",
    "B": "40 km/h",
    "C": "50 km/h",
    "D": "60 km/h"
  },
  "answer": "C",
  "topk_tokens": [
    "airspeed",
    "groundspeed",
    "vector addition"
  ],
  "uncertainties": [
    null,
    null,
    null
  ],
  "raw_output": "{\"concepts\": [\"airspeed\", \"groundspeed\", \"vector addition\"]}"
}