question: language:german
choices.label: A B C D
choices.text: library:books proposition:concept rational numbers:positive fractions earth:satellite
explanation: "german" belongs to "language". "books" are stored in the "library", and the corresponding location of "books" is "library". "proposition" refers to the semantics (concept actually expressed) of a judgment (statement), which is a "concept", but the word order is inconsistent with the query. "positive fractions" belong to "rational numbers". "earth" is a planet, not a "satellite".
relation: german language R2.2
relation: books library R3.6
relation: proposition concept R2.2
relation: positive fractions rational numbers R2.2