(Chemical effects) can be harmful.Logical formLearned from4 sentences. Human beings can be harmful.Logical formLearned from4 sentences. (Drug side-effects) can be harmful.Logical formLearned from4 sentences. Vitamins can be harmful.Logical formLearned from4 sentences. A site can be harmful to a computer.Logical formLearned from4 sentences. Exercises can be harmful.Logical formLearned from4 sentences. A reality can be harmful.Logical formLearned from4 sentences. The sun can be harmful.Logical formLearned from4 sentences. X-rays can be harmful.Logical formLearned from4 sentences. (Side affects) can be harmful.Logical formLearned from4 sentences. Manifestations can be harmful.Logical formLearned from4 sentences. A former can be harmful.Logical formLearned from4 sentences. (Emission amounts) can be harmful.Logical formLearned from4 sentences. Coolants can be harmful to persons.Logical formLearned from4 sentences. (Synthetic chemical ingredients) can be harmful.Logical formLearned from4 sentences.