(Air pollution) can be a contributor.Logical formLearned from5 sentences. Contributors may be granted.Logical formLearned from5 sentences. A contributor may be compared with (alcohol consumption).Logical formLearned from5 sentences. Contributors can be prevalent.Logical formLearned from5 sentences. A contributor can be as a freshman.Logical formLearned from5 sentences. A role may pertain-to a contributor.Logical formLearned from5 sentences. A look can be at contributors.Logical formLearned from5 sentences. Contributors can be alleged.Logical formLearned from5 sentences. Customers can be a contributor to keeping customers.Logical formLearned from5 sentences. A contributor can be to keeping customers.Logical formLearned from5 sentences. A female can be a contributor to an online resource.Logical formLearned from5 sentences. Contributors may pertain-to a newspaper.Logical formLearned from5 sentences. A contributor can be to losses.Logical formLearned from5 sentences. Persons may want contributors.Logical formLearned from5 sentences. A contributor can be in playoffs.Logical formLearned from5 sentences.