Context: The New York Public Library, which has the largest collection of any public library system in the United States, serves Manhattan, the Bronx, and Staten Island. Queens is served by the Queens Borough Public Library, the nation's second largest public library system, while the Brooklyn Public Library serves Brooklyn.

Question: What is the largest library in the United States?
Answer: The New York Public Library

Question: What is the second largest library in the US?
Answer: Queens Borough Public Library

Question: What is the name of the library system in Queens?
Answer: Queens Borough Public Library

Question: What is Brooklyn's public library system called?
Answer: Brooklyn Public Library

Question: Along with Staten Island and the Bronx, what borough is served by the New York Public Library?
Answer: Manhattan