question: word:sentence
choices.label: A B C D
choices.text: concept:judgment definition:theorem books:bookshelf valley:mountains
explanation: a "word" is part of a "sentence". the form of rational cognition includes "concept" and "judgment", and "concept" and "judgment" are one kind. "definition" is a precise and brief description of the essential characteristics of a thing or the connotation and extension of a concept. "theorem" refers to a statement that is proved to be true after being limited by logic. "definition" and "theorem" have no obvious logic relation. "book" means a book bound into a book, and "bookshelf" is the shelf on which books are bound. a "valley" is part of a "mountain".
relation: word sentence R2.3
relation: concept judgment R2.4
relation: valley mountains R2.3