(Greenhouse gas emissions) may contribute to global warming.Logical formLearned from20 sentences. Materials may contribute to (missile programs).Logical formLearned from20 sentences. A country may contribute some percent of a budget.Logical formLearned from20 sentences. A country may contribute funds.Logical formLearned from20 sentences. Workers may contribute for some years.Logical formLearned from20 sentences. A country may contribute some soldiers to a force.Logical formLearned from19 sentences. A male may contribute to some newspaper.Logical formLearned from19 sentences. A male may contribute to a book.Logical formLearned from19 sentences. A person may contribute to an album.Logical formLearned from19 sentences. A male may contribute (backing vocals).Logical formLearned from19 sentences. A person may contribute to a growth.Logical formLearned from19 sentences. Some others may contribute.Logical formLearned from19 sentences. A female may contribute a page.Logical formLearned from19 sentences. An article may contribute in contemplation of variety.Logical formLearned from19 sentences. Investing may be contributed.Logical formLearned from19 sentences.