A factor may contribute to recent changes.Logical formLearned from8 sentences. Speed may contribute to a crash.Logical formLearned from8 sentences. Persons may contribute to candidates.Logical formLearned from8 sentences. Heart may contribute to diseases of old age.Logical formLearned from8 sentences. (Brain damage) may contribute to stroke.Logical formLearned from8 sentences. Exercise may contribute to (insulin sensitivity).Logical formLearned from8 sentences. Panels may contribute to a success.Logical formLearned from8 sentences. Folks may contribute.Logical formLearned from8 sentences. Changes may contribute some percent of a global warming.Logical formLearned from8 sentences. A person may contribute a time to an opponent.Logical formLearned from8 sentences. A supervisory program of (investment banks) may contribute to a global financial crisis.Logical formLearned from8 sentences. (Polling analyst) may contribute to a report.Logical formLearned from8 sentences. A (volunteer movement) may contribute to (security successes).Logical formLearned from8 sentences. A person may contribute to a (research project).Logical formLearned from8 sentences. Studies may contribute to an understanding.Logical formLearned from8 sentences.