question: life:creature
choices.label: A B C D
choices.text: thought:human green:plants solar terms:calendar harvest:autumn
explanation: any "creature" has "life". any "human" has "thought". "plants" may be "green". "calendar" includes "solar terms". there may be a "harvest" in "autumn".
relation: green plants R3.2
relation: solar terms calendar R2.2
relation: harvest autumn R3.2