A height may pertain-to riots.Logical formLearned from30 sentences. Riots can be citywide.Logical formLearned from30 sentences. A riot can be in a country.Logical formLearned from29 sentences. A riot may pertain-to a road.Logical formLearned from29 sentences. A riot can be in some days.Logical formLearned from29 sentences. Riots can be ugly.Logical formLearned from29 sentences. Hundreds can be constituted-of-or-filled-with (riot policemen).Logical formLearned from29 sentences. A demonstration may turn into a riot.Logical formLearned from29 sentences. A (race riot) can be in a US-city.Logical formLearned from29 sentences. A spate can be constituted-of-or-filled-with riots.Logical formLearned from29 sentences. A (police officer) may touch_off some nights of riots.Logical formLearned from29 sentences. Rumors can be constituted-of-or-filled-with riots.Logical formLearned from29 sentences. Riots may hit areas.Logical formLearned from29 sentences. Riots may pertain-to last weekend.Logical formLearned from29 sentences. Riots may sweep a country.Logical formLearned from29 sentences.