A plant may produce chemicals.Logical formLearned from13 sentences. Genes may produce collagen.Logical formLearned from13 sentences. Some cells may produce (collagen fibers).Logical formLearned from13 sentences. A news-service may produce a package of stories.Logical formLearned from13 sentences. A lineup may produce.Logical formLearned from13 sentences. An enzyme may be produced.Logical formLearned from13 sentences. A male may produce some operas.Logical formLearned from13 sentences. A country may produce some metric tons of gold.Logical formLearned from13 sentences. A thrust may be produced.Logical formLearned from13 sentences. (Math arrays) may be produced with an (array environment).Logical formLearned from13 sentences. A country may produce statistics.Logical formLearned from13 sentences. A piece may be produced by a male.Logical formLearned from13 sentences. Processes may produce results.Logical formLearned from13 sentences. Diagrams may be produced.Logical formLearned from13 sentences. Cars may be produced at a plant.Logical formLearned from13 sentences.