A reference can be to a US-city.Logical formLearned from31 sentences. A (reference work) can be online.Logical formLearned from31 sentences. References can be to organizations.Logical formLearned from31 sentences. A (reference shelf) may pertain-to a person.Logical formLearned from31 sentences. Variety can be constituted-of-or-filled-with (reference materials).Logical formLearned from31 sentences. A reference can be to a movement.Logical formLearned from31 sentences. References can be to a term.Logical formLearned from31 sentences. References can be to terrorism.Logical formLearned from31 sentences. References can be embedded.Logical formLearned from31 sentences. A majority may pertain-to references.Logical formLearned from31 sentences. References can be to standards.Logical formLearned from31 sentences. A value may pertain-to a reference.Logical formLearned from31 sentences. Reference can be to conditions.Logical formLearned from31 sentences. A book can be constituted-of-or-filled-with reference.Logical formLearned from31 sentences. References may undergo a removal.Logical formLearned from31 sentences.