Contributions may show that something-is-the-case.Logical formLearned from12 sentences. Contributions can be during a period.Logical formLearned from12 sentences. A contribution can be to public policy.Logical formLearned from12 sentences. Contributions may pertain-to some companies.Logical formLearned from12 sentences. (Employer contributions) can be required.Logical formLearned from12 sentences. Contributions can be to political organizations.Logical formLearned from12 sentences. A contribution can be to a venture.Logical formLearned from12 sentences. A contribution can be to an invention.Logical formLearned from12 sentences. A contribution can be to literacy.Logical formLearned from12 sentences. Contributions can be to arts.Logical formLearned from12 sentences. Contributions can be interesting.Logical formLearned from12 sentences. Contributions can be signed.Logical formLearned from12 sentences. Contributions can be constituted-of-or-filled-with capital.Logical formLearned from12 sentences. A contribution can be demonstrated.Logical formLearned from12 sentences. A contribution can be strict.Logical formLearned from12 sentences.