question: works:books:series of books
choices.label: A B C D
choices.text: skirt:clothes:clothing tree:wood:forest idioms:words:vocabulary man:crowd:people
explanation: "works" belongs to "books". "series of books" refers to a set of "books" that are compiled from many "books". "clothes" is a kind of "clothing", and "clothing" is not composed of "clothes". "tree" is part of "wood" and "wood" is part of "forest". "idioms" belong to "words". "vocabulary" refers to the sum of all (or a specific range of) words and fixed phrases in a language. a "man" is part of a "crowd". but "people" are not made up of "crowds".
relation: works books R2.2
relation: books series of books R2.3
relation: clothes clothing R2.2
relation: tree wood R2.3
relation: idioms words R2.2
relation: words vocabulary R2.3
relation: man crowd R2.3