A male may contribute chapters.Logical formLearned from9 sentences. Writers may contribute to a series.Logical formLearned from9 sentences. Artists may contribute to a project.Logical formLearned from9 sentences. A male may contribute to a screenplay.Logical formLearned from9 sentences. Factors may contribute to a reduction.Logical formLearned from9 sentences. A male may contribute to a publication.Logical formLearned from9 sentences. A male may contribute a song.Logical formLearned from9 sentences. A male may contribute some pieces.Logical formLearned from9 sentences. A male may contribute a goal.Logical formLearned from9 sentences. A female may contribute vocals to a song.Logical formLearned from9 sentences. Farming may be cited as contributting factors.Logical formLearned from9 sentences. Growth may contribute to a growth.Logical formLearned from9 sentences. Epidemiology may contribute to a selection of therapy.Logical formLearned from9 sentences. Factors may contribute to a need.Logical formLearned from9 sentences. A project may contribute to (poverty reduction).Logical formLearned from9 sentences.