Countries may contribute.Logical formLearned from37 sentences. A person may contribute in ways.Logical formLearned from36 sentences. A male may contribute an article.Logical formLearned from36 sentences. Reporters may contribute to an article.Logical formLearned from36 sentences. (Greenhouse gas emissions) may contribute to global warming.Logical formLearned from36 sentences. (Staff researcher) may contribute to an article.Logical formLearned from36 sentences. A company may contribute.Logical formLearned from36 sentences. A male may contribute some rebounds.Logical formLearned from36 sentences. A female may contribute to a dispatch.Logical formLearned from36 sentences. A male may contribute with some games.Logical formLearned from35 sentences. (Greenhouse gases) may contribute to global warming.Logical formLearned from35 sentences. Students may contribute.Logical formLearned from35 sentences. Global warming may contribute to hurricanes.Logical formLearned from35 sentences. An article may be contributed.Logical formLearned from35 sentences. A person may contribute to a site.Logical formLearned from35 sentences.