A contribution can be to charity.Logical formLearned from24 sentences. A contribution can be to the national economy.Logical formLearned from24 sentences. A professor may make contributions.Logical formLearned from24 sentences. A contribution can be to a region.Logical formLearned from24 sentences. A contribution can be equitable.Logical formLearned from24 sentences. A contribution may pertain-to a worker.Logical formLearned from24 sentences. Contributions can be revolutionary.Logical formLearned from24 sentences. Nurses may make a contribution.Logical formLearned from24 sentences. A contribution can be to a situation.Logical formLearned from24 sentences. Contributions can be by a male.Logical formLearned from24 sentences. Contributions can be by an individual.Logical formLearned from24 sentences. A contribution can be to a force.Logical formLearned from24 sentences. Contributions may pertain-to engineers.Logical formLearned from24 sentences. A person can be grateful for contributions.Logical formLearned from24 sentences. Contributions can be from institutions.Logical formLearned from24 sentences.