A contribution can be open.Logical formLearned from9 sentences. Reference can be to a contribution.Logical formLearned from9 sentences. A contribution can be to international trade.Logical formLearned from9 sentences. Contributions can be to architecture.Logical formLearned from9 sentences. Contributions can be encouraging.Logical formLearned from9 sentences. Contribution can be to growth.Logical formLearned from9 sentences. A contribution can be to a decor.Logical formLearned from9 sentences. Graduates may make contributions.Logical formLearned from9 sentences. A contribution can be credible.Logical formLearned from9 sentences. (Money contributions) can be hard.Logical formLearned from9 sentences. Some basis can be for estimatting a contribution of drug.Logical formLearned from9 sentences. A contribution may be made by persons.Logical formLearned from9 sentences. Contributions can be to a support.Logical formLearned from9 sentences. Information can be on a contribution.Logical formLearned from9 sentences. A contribution can be to an organization.Logical formLearned from9 sentences.