A reference can be to a site.Logical formLearned from50 sentences. A person may make references.Logical formLearned from50 sentences. References can be to places.Logical formLearned from50 sentences. A person may use references.Logical formLearned from50 sentences. A reference can be accurate.Logical formLearned from49 sentences. References may be needed.Logical formLearned from49 sentences. References can be to individuals.Logical formLearned from49 sentences. A reference can be to an area.Logical formLearned from49 sentences. References may be provided.Logical formLearned from49 sentences. Reference can be to someone.Logical formLearned from49 sentences. Reference can be to gender.Logical formLearned from49 sentences. A reference can be to a story.Logical formLearned from49 sentences. A database can be constituted-of-or-filled-with references.Logical formLearned from49 sentences. Thousands can be constituted-of-or-filled-with references.Logical formLearned from49 sentences. Errors may be found in a (reference list).Logical formLearned from49 sentences.