Can anyone identify this plant, please?

This unusual plant cropped up shortly after the beginning of summer. It has grown fairly fast. It looks similar to a papaya tree that my mom grew years ago in Brownsville, Texas, but there's no reason for it to crop up here nearly 300 miles away?! No one around here eats papaya! I'd like to know what it is and what it's habits are. Is it annual or perennial, does it produce anything, and how and where did it come from? Thanks for your help!
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