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  1. en.wikipedia.org › wiki › PittsburghPittsburgh - Wikipedia

    19 hours ago · Pittsburgh ( / ˈpɪtsbɜːrɡ / PITS-burg) is a city in and the county seat of Allegheny County, Pennsylvania, United States. It is the second-most populous city in Pennsylvania, after Philadelphia, and the 68th-most populous city in the U.S., with a population of 302,971 as of the 2020 census. The city is located in southwestern Pennsylvania ...

  2. en.wikipedia.org › wiki › Rock_musicRock music - Wikipedia

    19 hours ago · Rock. Rock is a broad genre of popular music that originated as "rock and roll" in the United States in the late 1940s and early 1950s, developing into a range of different styles from the mid-1960s, particularly in the United States and the United Kingdom. [3] It has its roots in 1940s and 1950s rock and roll, a style that drew directly from ...