A reference may pertain-to a person.Logical formLearned from3 820 sentences. A reference may pertain-to a male.Logical formLearned from3 078 sentences. A reference can be clear.Logical formLearned from3 026 sentences. A reference can be to an article.Logical formLearned from2 809 sentences. A frame can be constituted-of-or-filled-with reference.Logical formLearned from2 795 sentences. References may pertain-to a person.Logical formLearned from2 709 sentences. A reference to an article may enhance a website.Logical formLearned from2 666 sentences. A point can be constituted-of-or-filled-with reference.Logical formLearned from2 592 sentences. References may pertain-to a male.Logical formLearned from2 223 sentences. References can be sexual.Logical formLearned from2 189 sentences. A reference can be to a country.Logical formLearned from1 695 sentences. A reference can be veiled.Logical formLearned from1 690 sentences. (Reference levels) may be set.Logical formLearned from1 678 sentences. A reference can be easy.Logical formLearned from1 445 sentences. A reference can be explicit.Logical formLearned from1 353 sentences.