Tornadoes may strike.Logical formLearned from13 sentences. A track may pertain-to a tornado.Logical formLearned from12 sentences. A tornado may be damaged.Logical formLearned from12 sentences. A tornado may strike a US-city.Logical formLearned from12 sentences. A tornado may track.Logical formLearned from12 sentences. A tornado may strike a school.Logical formLearned from12 sentences. A US-city may be hited by a tornado.Logical formLearned from12 sentences. Tornadoes can be destructive.Logical formLearned from12 sentences. A tornado may produce damage.Logical formLearned from12 sentences. A tornado may start.Logical formLearned from12 sentences. A (tornado warning) may be issued for an area.Logical formLearned from12 sentences. A (tornado siren) may go_off.Logical formLearned from12 sentences. A male can be a tornado.Logical formLearned from12 sentences. A tornado may be headed.Logical formLearned from12 sentences. A center may pertain-to a tornado.Logical formLearned from12 sentences.