(Gunfire and explosions) may echo.Logical formLearned from9 sentences. A (methane explosion) may tear through an underground (coal mine).Logical formLearned from9 sentences. Explosions can be from fireworks.Logical formLearned from9 sentences. Explosions can be over some months.Logical formLearned from9 sentences. A world-city can be behind an explosion.Logical formLearned from9 sentences. An explosion may level a building.Logical formLearned from9 sentences. A scene may investigate an explosion.Logical formLearned from9 sentences. A country may be killed in an (afternoon explosion).Logical formLearned from9 sentences. Authorities may attribute an explosion to a firecracker.Logical formLearned from9 sentences. Explosions can be yards.Logical formLearned from9 sentences. Explosions may be caused by some cruisers.Logical formLearned from9 sentences. Signs can be constituted-of-or-filled-with explosion.Logical formLearned from9 sentences. Some explosions can be in parts of a city.Logical formLearned from9 sentences. An explosion may collapse some buildings.Logical formLearned from9 sentences. Borrowing may undergo an explosion.Logical formLearned from9 sentences.