An auction may go_off.Logical formLearned from4 sentences. A gadget may go_off.Logical formLearned from4 sentences. A blast may go_off at an entrance of a mosque.Logical formLearned from4 sentences. A bomb may go_off under a car of a bodyguard.Logical formLearned from4 sentences. A (car bomb) may go_off in a town.Logical formLearned from4 sentences. A (car bomb) may go_off at a square.Logical formLearned from4 sentences. A (car bomb) may go_off in an afternoon.Logical formLearned from4 sentences. A homemade bomb may go_off in a market.Logical formLearned from4 sentences. A world-city may go_off in succession.Logical formLearned from4 sentences. A (car bomb) may go_off among a crowd of persons.Logical formLearned from4 sentences. An explosive charge may go_off in an area.Logical formLearned from4 sentences. An explosive may go_off.Logical formLearned from4 sentences. A (car bomb) may go_off on a street.Logical formLearned from4 sentences. Some bombs may go_off within some hours.Logical formLearned from4 sentences. Elections may go_off without a hitch.Logical formLearned from4 sentences.