question: chemist:laboratory
choices.label: A B C D
choices.text: doctor:hospital bed designer:drawings worker:factory actor:rehearsal field
explanation: a "laboratory" is the place where a "chemist" works. "doctors" work in hospitals, but "hospital beds" are not places where "doctors" work. the "designer" designs the "drawings". a "factory" is a place where a "worker" works. the theater and shooting base are the main working places of the "actors".
relation: chemist laboratory R3.5
relation: designer drawings R4.4
relation: worker factory R3.5