References can be up-to-date.Logical formLearned from39 sentences. A reference can be to an issue.Logical formLearned from39 sentences. References can be from clients.Logical formLearned from39 sentences. References can be suggestive.Logical formLearned from39 sentences. References can be to an object.Logical formLearned from39 sentences. A reference can be to a report.Logical formLearned from39 sentences. (Reference materials) can be online.Logical formLearned from39 sentences. References can be to topics.Logical formLearned from39 sentences. A reference can be to an international-political-entity.Logical formLearned from39 sentences. References can be to culture.Logical formLearned from39 sentences. Reference can be to conditions.Logical formLearned from39 sentences. A reference can be to a church.Logical formLearned from38 sentences. References can be to current events.Logical formLearned from38 sentences. A reference can be to a village.Logical formLearned from38 sentences. A reference may suggest that something-is-the-case.Logical formLearned from38 sentences.