{
  "question": "The second law of thermodynamics tells us that heat doesn’t flow from",
  "options": {
    "A": "hot to cold ever",
    "B": "cold to hot ever",
    "C": "hot to cold without external energy",
    "D": "cold to hot without external energy"
  },
  "answer": "D",
  "topk_tokens": [
    "Heat Transfer",
    "Second Law of Thermodynamics",
    "Energy Conservation"
  ],
  "uncertainties": [
    null,
    null,
    null
  ],
  "raw_output": "{\"concepts\": [\"Heat Transfer\", \"Second Law of Thermodynamics\", \"Energy Conservation\"]}"
}