question: doctor:patient:diagnosis
choices.label: A B C D
choices.text: railway police:passengers:buy tickets farmer:farmland:farming salesperson:customer:shopping waiter:diner:service
explanation: "doctors " will "diagnose" "patients". "passengers" need to "buy tickets" to get on the train. "farmers" are "farming" on the "farmlands”. a "customer" "shops" in a supermarket. "waiters""serve""diners".
relation: passengers buy tickets R4.1
relation: customer shopping R4.1