A contribution may pertain-to a chapter.Logical formLearned from14 sentences. Contributions can be by parties.Logical formLearned from14 sentences. Contributions can be to a family.Logical formLearned from14 sentences. Contributions can be useful.Logical formLearned from14 sentences. A combination may pertain-to a contribution.Logical formLearned from14 sentences. A contribution may be required.Logical formLearned from14 sentences. A breadth may pertain-to contributions.Logical formLearned from14 sentences. A contribution can be to health of persons.Logical formLearned from14 sentences. A paper may report contributions of a student.Logical formLearned from14 sentences. Terms may pertain-to a (contribution agreement).Logical formLearned from14 sentences. A contribution can be instrumental.Logical formLearned from14 sentences. Contributions can be to a national security.Logical formLearned from14 sentences. Contributions can be to biological sciences.Logical formLearned from14 sentences. A contribution can be to costs.Logical formLearned from14 sentences. A contribution can be provincial.Logical formLearned from14 sentences.