(Weight gain) can be harmful.Logical formLearned from4 sentences. Children can be harmful.Logical formLearned from4 sentences. Second-hand smoke can be harmful to adults.Logical formLearned from4 sentences. A class can be harmful.Logical formLearned from4 sentences. Trans can be harmful.Logical formLearned from4 sentences. Indoor light can be harmful.Logical formLearned from4 sentences. A (network activity) can be harmful.Logical formLearned from4 sentences. Conditions can be harmful to health.Logical formLearned from4 sentences. A war can be harmful.Logical formLearned from4 sentences. Cycles can be harmful.Logical formLearned from4 sentences. Contaminants can be harmful to humans.Logical formLearned from4 sentences. (Bird flu) can be harmful to humans.Logical formLearned from4 sentences. Aspirin can be harmful to an unborn baby.Logical formLearned from4 sentences. (Land uses) can be harmful.Logical formLearned from4 sentences. (Health impacts) can be harmful.Logical formLearned from4 sentences.