Context: Three Rivers Park is a public urban waterfront park along the Allegheny, Monongahela, and Ohio Rivers in Pittsburgh, Pennsylvania.\n\nQuestion: what are the three rivers of pittsburgh pennsylvania?
Step-by-step reasoning:
the Allegheny , Monongahela , and Ohio Rivers
To answer this question, we should know that: Three Rivers Park is a public urban waterfront park along the Allegheny, Monongahela, and Ohio Rivers in Pittsburgh, Pennsylvania.

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The final answer: the Allegheny , Monongahela , and Ohio Rivers