An explosion may be caused by a (gas leak).Logical formLearned from79 sentences. A shuttle may undergo an explosion.Logical formLearned from79 sentences. An explosion may pertain-to month.Logical formLearned from79 sentences. An explosion may cause injuries.Logical formLearned from79 sentences. An explosion may be caused by a device.Logical formLearned from79 sentences. A (car bomb) may undergo an explosion.Logical formLearned from78 sentences. Explosions can be at a (propane facility).Logical formLearned from78 sentences. An explosion can be in demand.Logical formLearned from78 sentences. An explosion can be at a house.Logical formLearned from77 sentences. An one may be hurted in an explosion.Logical formLearned from77 sentences. Explosions can be repeated.Logical formLearned from77 sentences. An explosion can be huge.Logical formLearned from77 sentences. Some persons may die in an explosion.Logical formLearned from76 sentences. Some explosions may rock a world-city.Logical formLearned from76 sentences. An explosion can be at some a.m..Logical formLearned from76 sentences.