A (trade union federation) can be powerful.Logical formLearned from39 sentences. Control may pertain-to unions.Logical formLearned from39 sentences. A US-president can be tantamount to invitting unions.Logical formLearned from39 sentences. An union can be valid.Logical formLearned from39 sentences. A person can be in an union.Logical formLearned from39 sentences. An union may reach agreement.Logical formLearned from39 sentences. (Union leaders) may complain that something-is-the-case.Logical formLearned from39 sentences. Officials can be from some unions.Logical formLearned from39 sentences. An agreement can be between an union.Logical formLearned from39 sentences. An union may pertain-to (hotel workers).Logical formLearned from39 sentences. Negotiations can be between unions.Logical formLearned from39 sentences. An union may demand an increase.Logical formLearned from39 sentences. A rank-and-file may pertain-to an union.Logical formLearned from39 sentences. An union may pertain-to (metal workers).Logical formLearned from39 sentences. An union may declare a strike.Logical formLearned from39 sentences.