Assertion: borough's area | /r/HasProperty | incorporated into new york city
Facets:
Source sentences:
text: This dates from the mid-19th century when the southwestern area of Westchester County west of the Bronx River, was incorporated into New York City and known as the Northside.
text: This dates from the mid-19th century when the southwestern area of Westchester County west of the Bronx River, was incorporated into New York City and known as the Northside.