question: book:paper:pen
choices.label: A B C D
choices.text: river:water:sea cooked rice:rice:vegetables forest:tree:wood gun:bullet:cannon
explanation: "book" is processed from "paper", and "paper" and "pen" belong to stationery. "water" is part of "river" and "sea". "cooked ice" is processed from "rice", and "rice" and "vegetables" are ingredients. the "tree" is part of the "forest". "gun" and "bullet" can only be used together.
relation: paper book R3.10
relation: paper pen R2.4
relation: water river R2.3
relation: water sea R2.3
relation: rice cooked rice R3.10
relation: rice vegetables R2.4
relation: tree forest R2.3
relation: gun bullet R3.10