Entities represent the objects of the domain. In the Museum domain, this includes not only the museum artifacts, but their designers, the materials they are made from, the styles they are made in, the periods they belong to, the locations of their manufacture, etc.
Entities are typically specific entities: real-world individuals. However, some of the entities will be generic entities, those representing classes of entities, such as Art-Deco jewellery. We also cater to sets of entities, which can be realised through either plural anaphora, or conjunctive NPs.