Activities may be contributed to stability.Logical formLearned from10 sentences. Employers may contribute money.Logical formLearned from10 sentences. Factors may contribute to a death.Logical formLearned from10 sentences. Genes may contribute.Logical formLearned from10 sentences. Employers may contribute to accounts.Logical formLearned from10 sentences. Prices may contribute to a bulk of an increase.Logical formLearned from10 sentences. Persons may contribute to a fund.Logical formLearned from10 sentences. A country may contribute to an economic development.Logical formLearned from10 sentences. Failure may contribute to an accident.Logical formLearned from10 sentences. Research may contribute to a (knowledge base).Logical formLearned from10 sentences. Mistakes may contribute to a failure.Logical formLearned from10 sentences. Forces may contribute.Logical formLearned from10 sentences. (Greenhouse gases) may contribute to global-climate change.Logical formLearned from10 sentences. A defense may contribute.Logical formLearned from10 sentences. Properties may contribute to a fall.Logical formLearned from10 sentences.