A worm can be harmful.Logical formLearned from4 sentences. An (internet activity) can be harmful.Logical formLearned from4 sentences. Burdens can be harmful.Logical formLearned from4 sentences. A fall-out can be harmful.Logical formLearned from4 sentences. Books can be harmful.Logical formLearned from4 sentences. Themselves can be harmful.Logical formLearned from4 sentences. An atmosphere can be harmful.Logical formLearned from4 sentences. (Pollution levels) can be harmful.Logical formLearned from4 sentences. Disorders can be harmful.Logical formLearned from4 sentences. A deal can be harmful.Logical formLearned from4 sentences. (Furniture placement) can be harmful to health.Logical formLearned from4 sentences. Rates can be harmful.Logical formLearned from4 sentences. Screening can be harmful.Logical formLearned from4 sentences. Pesticides can be harmful to skin.Logical formLearned from4 sentences. Areas can be harmful.Logical formLearned from4 sentences.