(Riot police) may wear helmets.Logical formLearned from25 sentences. (Riot police) may respond with gas.Logical formLearned from25 sentences. A (riot gear) can be heavy.Logical formLearned from25 sentences. An investigation can be into riots.Logical formLearned from24 sentences. (Race riots) can be in 1960s.Logical formLearned from24 sentences. A result can be constituted-of-or-filled-with riots.Logical formLearned from24 sentences. Riots can be destructive.Logical formLearned from24 sentences. Riots can be spontaneous.Logical formLearned from24 sentences. Memories can be constituted-of-or-filled-with riots.Logical formLearned from24 sentences. Officers may wear (riot gear).Logical formLearned from24 sentences. A riot can be full-blown.Logical formLearned from24 sentences. (Race riots) may pertain-to 1960s.Logical formLearned from24 sentences. Riots can be in a state.Logical formLearned from24 sentences. A riot can be by supporters.Logical formLearned from24 sentences. Riots may erupt across a country.Logical formLearned from24 sentences.