{
  "question": "The vibrations in a longitudinal wave move in a direction",
  "options": {
    "A": "along and parallel to the wave",
    "B": "perpendicular to the wave",
    "C": "Both of these",
    "D": "Neither of these"
  },
  "answer": "A",
  "topk_tokens": [
    "longitudinal_waves",
    "wave_vibration_direction",
    "wave_propagation_direction"
  ],
  "uncertainties": [
    null,
    null,
    null
  ],
  "raw_output": "{\"concepts\": [\"longitudinal_waves\", \"wave_vibration_direction\", \"wave_propagation_direction\"]}"
}