Persons may make a contribution.Logical formLearned from313 sentences. Contributions can be questionable.Logical formLearned from303 sentences. A contribution may pertain-to a country.Logical formLearned from302 sentences. A contribution can be to a campaign.Logical formLearned from302 sentences. A contribution can be to a country.Logical formLearned from300 sentences. A contribution can be to an effort.Logical formLearned from297 sentences. A contribution can be to an attainment of objectives.Logical formLearned from296 sentences. Some aspects may make a contribution to an attainment of objectives.Logical formLearned from293 sentences. A contribution can be monthly.Logical formLearned from291 sentences. A contribution can be to the world.Logical formLearned from290 sentences. Contributions may be made.Logical formLearned from287 sentences. A contribution can be to a debate.Logical formLearned from284 sentences. A contribution can be to an effort.Logical formLearned from282 sentences. A contribution may pertain-to a paper.Logical formLearned from281 sentences. A contribution can be monetary.Logical formLearned from281 sentences.