Detailed Instructions: In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Problem:How many people in New York use a rail system for transportation?, Context: Mass transit in New York City, most of which runs 24 hours a day, accounts for one in every three users of mass transit in the United States, and two-thirds of the nation's rail riders live in the New York City Metropolitan Area.
Solution:
two-thirds of the nation's rail riders