Sales can be harmful.Logical formLearned from2 sentences. Gasoline can be harmful.Logical formLearned from2 sentences. A neurotoxin can be harmful.Logical formLearned from2 sentences. (Media violence) can be harmful.Logical formLearned from2 sentences. A way of dealing with teenage pregnancy can be harmful.Logical formLearned from2 sentences. Harmful algal blooms can be poisonous to marine life.Logical formLearned from2 sentences. Red tides may result from harmful algal blooms.Logical formLearned from2 sentences. A (chemical dioxin) can be harmful.Logical formLearned from2 sentences. A (chemical methanol) can be harmful.Logical formLearned from2 sentences. (Formaldehyde levels) can be harmful.Logical formLearned from2 sentences. Beliefs can be harmful to bears.Logical formLearned from2 sentences. (Junk food) can be harmful to health.Logical formLearned from2 sentences. Some political rhetoric can be harmful to a democracy.Logical formLearned from2 sentences. (Food imports) can be harmful.Logical formLearned from2 sentences. A chemical can be harmful to human health.Logical formLearned from2 sentences.