A range can be constituted-of-or-filled-with reference.Logical formLearned from58 sentences. A reference can be to some object.Logical formLearned from58 sentences. A reference can be to a document.Logical formLearned from58 sentences. A reference can be to a president.Logical formLearned from58 sentences. A direct reference can be to a country.Logical formLearned from58 sentences. A reference may pertain-to a world-city.Logical formLearned from57 sentences. A (reference source) can be comprehensive.Logical formLearned from57 sentences. Reference can be to a use.Logical formLearned from57 sentences. References can be in works.Logical formLearned from57 sentences. A person may find some references.Logical formLearned from57 sentences. Reference can be to an issue.Logical formLearned from57 sentences. References can be to a need.Logical formLearned from57 sentences. References can be from a month.Logical formLearned from57 sentences. A reference can be to a document.Logical formLearned from57 sentences. A reference can be gratuitous.Logical formLearned from57 sentences.