{
  "question": "In a mixture of hydrogen oxygen and nitrogen gases at a given temperature the molecules having the greatest average speed are those of",
  "options": {
    "A": "hydrogen.",
    "B": "oxygen.",
    "C": "nitrogen.",
    "D": "But all have the same speed on average."
  },
  "answer": "A",
  "topk_tokens": [
    "average molecular speed",
    "temperature and molecular speed",
    "molecular mass and speed"
  ],
  "uncertainties": [
    null,
    null,
    null
  ],
  "raw_output": "{\"concepts\": [\"average molecular speed\", \"temperature and molecular speed\", \"molecular mass and speed\"]}"
}