A contribution may manifest effectiveness.Logical formLearned from15 sentences. Contributions can be from an audience.Logical formLearned from15 sentences. Charitable contributions can be to organizations.Logical formLearned from15 sentences. A (conservation contribution) can be qualified.Logical formLearned from15 sentences. Contributions may be published.Logical formLearned from15 sentences. Contributions can be to a body of knowledge.Logical formLearned from15 sentences. A contribution can be to a theme.Logical formLearned from15 sentences. Contributions can be to security.Logical formLearned from15 sentences. Contributions can be to projects.Logical formLearned from15 sentences. A contribution can be to (food security).Logical formLearned from15 sentences. Contributions can be to campaigns.Logical formLearned from15 sentences. Contributions can be by researcher.Logical formLearned from15 sentences. Contributions can be to medical research.Logical formLearned from15 sentences. Contributions may be invested.Logical formLearned from15 sentences. Opportunities can be for contributions.Logical formLearned from15 sentences.