Question: Which city along New Jersey Route 4 was renamed in 1921?
Sentence (from "Hackensack, New Jersey"): As of the 2010 United States Census, the city's population was 43,010, reflecting an increase of 333 (+0.8%) from the 42,677 counted in the 2000 Census, which had, in turn, increased by 5,628 (+15.2%) from the 37,049 counted in the 1990 Census.
Relevant evidence: No