Question: 15 Union Square West overlooks the intersection where what two roads came together in the early 19th century?
Sentence (from "Union Square, Manhattan"): The current Union Square Park is bounded by 14th Street on the south, Union Square West on the west side, 17th Street on the north, and on the east Union Square East, which links together Broadway and Park Avenue South to Fourth Avenue and the continuation of Broadway.
Relevant evidence: No