A male may contribute to magazines.Logical formLearned from53 sentences. Factors may contribute to an increase.Logical formLearned from52 sentences. A person may contribute to a team.Logical formLearned from52 sentences. (News services) may contribute to a report.Logical formLearned from52 sentences. (Carbon dioxide) may contribute to global warming.Logical formLearned from52 sentences. Factors may contribute to a success.Logical formLearned from51 sentences. A chapter may be contributed by an author.Logical formLearned from51 sentences. Some countries may contribute.Logical formLearned from50 sentences. Human activity may contribute to (climate change).Logical formLearned from50 sentences. A male may contribute to a book.Logical formLearned from50 sentences. A country may contribute to a force.Logical formLearned from50 sentences. A person may contribute to a male.Logical formLearned from49 sentences. A country may contribute to efforts.Logical formLearned from49 sentences. A person may contribute to a development of women.Logical formLearned from49 sentences. A country may contribute.Logical formLearned from49 sentences.