A contribution can be to a revolution.Logical formLearned from20 sentences. An award can be for contribution.Logical formLearned from20 sentences. A contribution can be pledged.Logical formLearned from20 sentences. A contribution may pertain-to countries.Logical formLearned from20 sentences. Contributions can be to pensions.Logical formLearned from19 sentences. A contribution can be viable.Logical formLearned from19 sentences. A man may make a contribution.Logical formLearned from19 sentences. A contribution can be to an end.Logical formLearned from19 sentences. (Campaign contributions) can be to politicians.Logical formLearned from19 sentences. Contributions can be constituted-of-or-filled-with (recording artists).Logical formLearned from19 sentences. A contribution can be to chemistry.Logical formLearned from19 sentences. A description may pertain-to contributions.Logical formLearned from19 sentences. A contribution may pertain-to an institution.Logical formLearned from19 sentences. A contribution can be to law.Logical formLearned from19 sentences. A contribution can be heroic.Logical formLearned from19 sentences.