(Object reference) may be set to an instance of an object.Logical formLearned from96 sentences. A reference can be to persons.Logical formLearned from96 sentences. A person may find references.Logical formLearned from96 sentences. A reference may pertain-to a country.Logical formLearned from96 sentences. An inertial frame can be constituted-of-or-filled-with reference.Logical formLearned from95 sentences. References can be in literature.Logical formLearned from95 sentences. Some references can be to a country.Logical formLearned from95 sentences. References can be to a person.Logical formLearned from95 sentences. References can be popular.Logical formLearned from95 sentences. A reference can be to a line.Logical formLearned from94 sentences. A reference can be geographic.Logical formLearned from94 sentences. Reference to persons may be made in a context.Logical formLearned from94 sentences. A reference can be obligatory.Logical formLearned from94 sentences. An article may incorporate text from reference.Logical formLearned from93 sentences. Reference can be to a website.Logical formLearned from93 sentences.