generate questions: 14th Street is a main numbered street in Manhattan. It begins at Avenue C and ends at West Street. Its length is 3.4 km (2.1 mi). It has six subway stations:
Where does 14th Street begin? {sep_token} Where does 14th Street end? {sep_token} How many subway stations are on 14th Street? {sep_token} What is the length of 14th Street in miles?