A (flood control headquarters) may pertain-to a world-city.Logical formLearned from14 sentences. Floods may start.Logical formLearned from14 sentences. A flood may pertain-to a summer.Logical formLearned from14 sentences. Damage may pertain-to floods.Logical formLearned from14 sentences. A flood may last.Logical formLearned from14 sentences. Floods may kill persons.Logical formLearned from14 sentences. Flash floods may be caused by rains.Logical formLearned from14 sentences. (Flood waters) may start.Logical formLearned from14 sentences. Areas may be affected by floods.Logical formLearned from14 sentences. A (flood peak) can be on a river.Logical formLearned from14 sentences. A flood may sweep a country.Logical formLearned from14 sentences. Floods may wash_away roads.Logical formLearned from14 sentences. Floods may pertain-to a century.Logical formLearned from14 sentences. A flood may pertain-to a region.Logical formLearned from14 sentences. A series can be constituted-of-or-filled-with (flash floods).Logical formLearned from14 sentences.