An union can be unprecedented.Logical formLearned from15 sentences. (Union officials) may represent workers.Logical formLearned from15 sentences. Unions may undergo a confederation.Logical formLearned from15 sentences. Some (union officials) may represent employees.Logical formLearned from15 sentences. An union may have contracts.Logical formLearned from15 sentences. (Union leader) may say in a statement.Logical formLearned from15 sentences. Bargaining can be with unions.Logical formLearned from15 sentences. (Labor talks) can be between unions.Logical formLearned from15 sentences. An union may stage strikes.Logical formLearned from15 sentences. An union may seek a contract.Logical formLearned from15 sentences. A growth may pertain-to an union.Logical formLearned from15 sentences. A pension may pertain-to an union.Logical formLearned from15 sentences. An (union leader) may pertain-to miners.Logical formLearned from15 sentences. An union may call for a strike.Logical formLearned from15 sentences. An union can be with some members.Logical formLearned from15 sentences.