question: food:hunger
choices.label: A B C D
choices.text: clothes:cold question:answer boiled water:drink door:lock
explanation: "food" can solve "hunger". "clothes" can resist the "cold". ask a "question", you can get an "answer", but a "question" cannot solve the "answer". "boiled water" can be "drunk", but "boiled water" cannot solve "drinking". "lock" is a component of "door", and "door" cannot solve "lock".
relation: food hunger R5.1
relation: clothes cold R5.1
relation: question answer R4.2
relation: boiled water drink R4.2
relation: door lock R4.2