question: citizens:teachers:civil servants
choices.label: A B C D
choices.text: worker:migrant worker:rural areas entrepreneur:merchant:mall electrical appliances:refrigerator:television migrant worker:peasant:rural  areas
explanation: "teachers" belong to "citizens" and "civil servants" belong to "citizens". "migrant workers" are a kind of "workers", and "migrant workers" may come from "rural areas". "entrepreneurs" belong to "merchants", and there are "merchants" in "malls" to make money. "refrigerator" belongs to "electrical appliances", "television" belongs to "electrical appliances", and "refrigerator" and "television" belong to the same category. "peasants" live together in "rural areas".
relation: teachers civil servants R2.4
relation: worker migrant worker R2.2
relation: migrant worker rural  areas R3.10
relation: entrepreneur merchant R2.2
relation: merchant mall R3.10
relation: refrigerator television R2.4
relation: peasant rural  areas R3.10