An addition can be chemical.Logical formLearned from17 sentences. A chemical evolution may pertain-to the universe.Logical formLearned from17 sentences. Letters can be chemical.Logical formLearned from17 sentences. A defoliant can be chemical.Logical formLearned from17 sentences. A giant can be chemical.Logical formLearned from17 sentences. An (emergency response) can be chemical.Logical formLearned from17 sentences. Releases can be chemical.Logical formLearned from17 sentences. A (vapor deposition process) can be chemical.Logical formLearned from17 sentences. A (chain reaction) can be chemical.Logical formLearned from17 sentences. Preparations can be chemical.Logical formLearned from17 sentences. Influences can be chemical.Logical formLearned from17 sentences. A corrosion can be chemical.Logical formLearned from17 sentences. (Exposure side effects) can be chemical.Logical formLearned from17 sentences. Combinations can be chemical.Logical formLearned from17 sentences. Tin can be a chemical compound.Logical formLearned from17 sentences.