question: frog:pest
choices.label: A B C D
choices.text: teacher:student eagle:mouse dragonfly:butterfly milk:cows
explanation: "frogs" prey on "pests", and "pests" can be eaten by "frogs". "teacher" teaches "student", "teacher" is a profession, and "student" is the professional object of "teacher". the "eagle" preys on the "mouse", and the "mouse" is eaten by the "eagle". "dragonflies" and "butterflies" are the same species but not the same animal. "cow" can produce "milk".
relation: frog pest R3.10
relation: teacher student R3.10
relation: eagle mouse R3.10
relation: dragonfly butterfly R2.6
relation: milk cows R3.10