A reaction can be upbeat.Logical formLearned from54 sentences. A (chain reaction) can be self-sustaining.Logical formLearned from54 sentences. A critical reaction can be mixed.Logical formLearned from54 sentences. Reactions may be varied.Logical formLearned from53 sentences. Reactions can be nervous.Logical formLearned from53 sentences. A reaction can be intramolecular.Logical formLearned from53 sentences. A reaction can be stern.Logical formLearned from53 sentences. A reaction can be to a drug.Logical formLearned from53 sentences. A reaction can be to a person.Logical formLearned from53 sentences. A reaction can be passionate.Logical formLearned from53 sentences. A night may start a (chain reaction).Logical formLearned from53 sentences. A reaction can be to a tragedy.Logical formLearned from53 sentences. A (chain reaction) may change lives.Logical formLearned from53 sentences. A team may undergo a reaction.Logical formLearned from53 sentences. A reaction can be to presence.Logical formLearned from53 sentences.