About how many items does the library that the 53rd Street Library is a branch of contain?
53rd Street Library: The 53rd Street Library is a branch of the New York Public Library at 18 West 53rd Street just across the street from the Museum of Modern Art. New York Public Library:  With nearly 53 million items, the New York Public Library is the second largest public library in the United States (behind the Library of Congress), and fourth largest in the world.
nearly 53 million items