A (chemical plant) may undergo an explosion.Logical formLearned from7 sentences. Explosion may knock_out some (ventilation systems).Logical formLearned from7 sentences. A tragedy may be caused by explosion.Logical formLearned from7 sentences. A (car bomb explosion) may undergo a (death toll).Logical formLearned from7 sentences. An explosion may occur in a (car park).Logical formLearned from7 sentences. Explosions may jolt a world-city.Logical formLearned from7 sentences. Intensity may undergo an explosion.Logical formLearned from7 sentences. Some soldiers may be injured in a (mine explosion).Logical formLearned from7 sentences. Guerrillas may set_off an explosion.Logical formLearned from7 sentences. An explosion may rip through an open market.Logical formLearned from7 sentences. A (gas explosion) may occur at a (coal mine) of a company.Logical formLearned from7 sentences. An explosion can be on a subway.Logical formLearned from7 sentences. An explosion can be at a shop.Logical formLearned from7 sentences. A (gas explosion) may undergo a (death toll).Logical formLearned from7 sentences. A moratorium can be on conducting nuclear-test explosions.Logical formLearned from7 sentences.