A contributor can be to (ozone problems).Logical formLearned from3 sentences. Aircraft can be a contributor to (ozone problems).Logical formLearned from3 sentences. Contributors may include (parent companies) of (news organizations).Logical formLearned from3 sentences. (News items) may be gathered from contributors.Logical formLearned from3 sentences. A male can be (campaign contributors).Logical formLearned from3 sentences. Contributors may travel.Logical formLearned from3 sentences. Contributors can be to a company.Logical formLearned from3 sentences. Contributors may pertain-to a weekday.Logical formLearned from3 sentences. Contributors may include a singer.Logical formLearned from3 sentences. Dinners can be with contributors.Logical formLearned from3 sentences. A contributor can be to a soundtrack.Logical formLearned from3 sentences. Contributors can be to cancer.Logical formLearned from3 sentences. A contributor may undergo a nomination.Logical formLearned from3 sentences. Contributors may offer views.Logical formLearned from3 sentences. Some contributors can be to a show.Logical formLearned from3 sentences.