A (bomb attack) may pertain-to a US-city.Logical formLearned from22 sentences. Bombs can be on board.Logical formLearned from22 sentences. Bomb may be used.Logical formLearned from21 sentences. Involvement can be in (bomb blasts).Logical formLearned from21 sentences. Some others may be wounded in some (car bomb attacks).Logical formLearned from21 sentences. A bomb can be self-made.Logical formLearned from21 sentences. Insurgents may explode a bomb.Logical formLearned from21 sentences. Some others may be injured in a (car bomb).Logical formLearned from21 sentences. A bomb may go_off by accident.Logical formLearned from21 sentences. An explosion may be caused by a (car bomb).Logical formLearned from21 sentences. A (car bomb) may blow_up.Logical formLearned from21 sentences. A bomb may be placed on a bicycle.Logical formLearned from21 sentences. A bomb may undergo a creation.Logical formLearned from21 sentences. (Cluster bombs) may undergo a use.Logical formLearned from21 sentences. Bombs can be accurate.Logical formLearned from21 sentences.