A source can be harmful.Logical formLearned from7 sentences. Communications can be harmful.Logical formLearned from7 sentences. Occurrences can be harmful.Logical formLearned from7 sentences. Hazards can be harmful.Logical formLearned from7 sentences. A (sulfur dioxide) can be harmful.Logical formLearned from7 sentences. (Oxygen molecules) can be harmful.Logical formLearned from7 sentences. (Nitrogen oxen) can be harmful.Logical formLearned from7 sentences. (Tax increases) can be harmful.Logical formLearned from7 sentences. An image can be harmful.Logical formLearned from7 sentences. Care can be harmful.Logical formLearned from7 sentences. An ammonia can be harmful.Logical formLearned from7 sentences. Alien species can be harmful.Logical formLearned from7 sentences. Clots can be harmful.Logical formLearned from7 sentences. Conditions can be harmful.Logical formLearned from7 sentences. A quantity can be harmful.Logical formLearned from7 sentences.