Bombs may be dropped by planes.Logical formLearned from21 sentences. Bomb may go_off.Logical formLearned from21 sentences. A bomb may explode in a (garbage can).Logical formLearned from21 sentences. A (bomb threat) can be phony.Logical formLearned from21 sentences. Some units can be constituted-of-or-filled-with bomb.Logical formLearned from21 sentences. A bomb may blow a US-city.Logical formLearned from21 sentences. A country may provide a country with some units of bomb.Logical formLearned from21 sentences. A (bomb attack) can be on a patrol.Logical formLearned from21 sentences. A cache can be constituted-of-or-filled-with homemade bombs.Logical formLearned from21 sentences. Bombs can be to a country.Logical formLearned from21 sentences. A bomb may rip through an (air force bus).Logical formLearned from21 sentences. A bomb may target an (air force bus).Logical formLearned from21 sentences. A (petrol bomb attack) can be suspected.Logical formLearned from21 sentences. A person may put a bomb.Logical formLearned from21 sentences. A size may pertain-to a bomb.Logical formLearned from21 sentences.