question: actor:director
choices.label: A B C D
choices.text: writer:reader warrior:commander driver:traffic police singer:agent
explanation: the "actor" needs the guidance of the "director" to complete the performance, and both are film workers. "writers" are not guided by "readers". "warriors" fight under the guidance of "commanders", and both of them are servicemen. the "driver" cannot complete his driving work under the guidance of "traffic police". a "singer" needs the service of an "agent".
relation: actor director R3.10
relation: warrior commander R3.10