 Most importantly, entities play a role as the semantic values of referential noun phrases (NPs), as the things that quantificational NPs range over, and as arguments of predicates. Referential NPs are occurrences of NPs in sentences in which they have the function of standing for entities. Natural language comes with a wealth of expressions referring to or quantifying over entities, as well as a wealth of expressions that express properties of entities (or relations among them). The standard view is that with the utterance of a simple sentence like the apple is red, the property expressed by red is attributed to the entity the speaker refers to with the apple.