Contributions can be to exchanges.Logical formLearned from11 sentences. Contributions can be sufficient.Logical formLearned from11 sentences. A contribution can be to an investigation.Logical formLearned from11 sentences. A contribution may pertain-to private sector.Logical formLearned from11 sentences. Contributions can be to a pot.Logical formLearned from11 sentences. Contributions may be added.Logical formLearned from11 sentences. A contribution may pertain-to a system.Logical formLearned from11 sentences. A contribution can be to preparations.Logical formLearned from11 sentences. Persons may remember a contribution.Logical formLearned from11 sentences. A contribution may pertain-to today.Logical formLearned from11 sentences. Contributions may be made by a president.Logical formLearned from11 sentences. Scholars may make contributions.Logical formLearned from11 sentences. Contributions can be toward (peacekeeping operations).Logical formLearned from11 sentences. Contributions can be to some groups.Logical formLearned from11 sentences. Contribution can be to teaching.Logical formLearned from11 sentences.