A substance can be harmful to a person.Logical formLearned from1 sentences. Quantities of fats can be harmful.Logical formLearned from1 sentences. A campaign can be harmful to children.Logical formLearned from1 sentences. An acidity can be harmful to a knee.Logical formLearned from1 sentences. A (nerve gas sarin) can be harmful.Logical formLearned from1 sentences. Monopolies can be harmful to consumers.Logical formLearned from1 sentences. An era can be harmful to women.Logical formLearned from1 sentences. A male may believe harmful to education.Logical formLearned from1 sentences. Ultraviolet radiation can be harmful.Logical formLearned from1 sentences. Breathing of (toluene vapor) can be harmful.Logical formLearned from1 sentences. High-energy particles can be harmful.Logical formLearned from1 sentences. Chemicals can be harmful to an atmosphere.Logical formLearned from1 sentences. Some books may be considered harmful to an empire.Logical formLearned from1 sentences. (Sewer gases) can be harmful.Logical formLearned from1 sentences. Compounds can be harmful to areas of a human body.Logical formLearned from1 sentences.