Collaboration can be between contributors.Logical formLearned from4 sentences. Some contributor may argue that something-is-the-case.Logical formLearned from4 sentences. Contributor can be to some books.Logical formLearned from4 sentences. A contributor can be to a rate.Logical formLearned from4 sentences. A fact can be a contributor to a rate.Logical formLearned from4 sentences. A contributor can be to (population growth).Logical formLearned from4 sentences. Employees may be involved as contributors.Logical formLearned from4 sentences. Contributors can be to violence.Logical formLearned from4 sentences. Contributors to an increase can be (consumer spending).Logical formLearned from4 sentences. Contributors can be to productivity.Logical formLearned from4 sentences. Contributors can be to an event.Logical formLearned from4 sentences. Contributors may pertain-to a language.Logical formLearned from4 sentences. Contributors can be to a (mailing list).Logical formLearned from4 sentences. A contributor can be to smogs.Logical formLearned from4 sentences. Biographies can be constituted-of-or-filled-with contributors.Logical formLearned from4 sentences.