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Pittsburgh ( PITS-burg) is a city in the state of Pennsylvania in the United States and the...
The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot...
Rouen (UK: , US: ; French: [ʁwɑ̃] (listen) or [ʁu.ɑ̃]) is a city on the River Seine in northern...