Chemicals can be toxic.Logical formLearned from10 907 sentences. Chemicals can be dangerous.Logical formLearned from2 451 sentences. Chemicals may undergo a use.Logical formLearned from2 400 sentences. Chemicals can be harmful.Logical formLearned from1 991 sentences. A chemical can be toxic.Logical formLearned from1 745 sentences. Exposure can be to chemicals.Logical formLearned from1 292 sentences. (Chemical weapons) may undergo a use.Logical formLearned from1 223 sentences. Chemicals can be harsh.Logical formLearned from812 sentences. A chemical may pertain-to a country.Logical formLearned from764 sentences. Chemicals may undergo a production.Logical formLearned from604 sentences. Levels can be constituted-of-or-filled-with chemicals.Logical formLearned from571 sentences. Chemicals can be environmental.Logical formLearned from551 sentences. An enzyme may catalyze a (chemical reaction).Logical formLearned from542 sentences. Some (emergency crews) may respond to a (chemical spill).Logical formLearned from534 sentences. Chemicals can be deadly.Logical formLearned from471 sentences.