(Union workers) may pertain-to persons.Logical formLearned from20 sentences. (Union membership) can be in a private sector.Logical formLearned from20 sentences. An (union leader) may pertain-to a US-city.Logical formLearned from20 sentences. Persons of a continent may form an union of promise.Logical formLearned from20 sentences. (Income levels) may pertain-to (union workers).Logical formLearned from20 sentences. (Union workers) can be dislocated.Logical formLearned from20 sentences. Unions can be across a country.Logical formLearned from20 sentences. Unions may contend that something-is-the-case.Logical formLearned from20 sentences. Unions can be in a us-state.Logical formLearned from20 sentences. (Member states) may pertain-to an union.Logical formLearned from20 sentences. Borders may pertain-to an union.Logical formLearned from20 sentences. (Police unions) can be powerful.Logical formLearned from20 sentences. Unions may hope that something-is-the-case.Logical formLearned from20 sentences. Workers may form an union.Logical formLearned from20 sentences. A walkout may pertain-to an union.Logical formLearned from20 sentences.