Reference can be to themselves.Logical formLearned from113 sentences. A reference can be to some film.Logical formLearned from112 sentences. References can be casual.Logical formLearned from112 sentences. References can be for reading.Logical formLearned from112 sentences. A (reference contract) may pertain-to a US-city.Logical formLearned from112 sentences. Reference can be to a question.Logical formLearned from111 sentences. Reference can be to a song.Logical formLearned from111 sentences. References can be published.Logical formLearned from111 sentences. References may undergo a collection.Logical formLearned from110 sentences. A reference may be made.Logical formLearned from109 sentences. References can be pointed.Logical formLearned from109 sentences. References can be to history.Logical formLearned from109 sentences. Reference can be to a world-city.Logical formLearned from109 sentences. Reference can be to a case.Logical formLearned from109 sentences. Reference can be to issues.Logical formLearned from109 sentences.