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.
Q: What type of parks are included in the ranking?, Context: In its 2013 ParkScore ranking, The Trust for Public Land reported that the park system in New York City was the second best park system among the 50 most populous U.S. cities, behind the park system of Minneapolis. ParkScore ranks urban park systems by a formula that analyzes median park size, park acres as percent of city area, the percent of city residents within a half-mile of a park, spending of park services per resident, and the number of playgrounds per 10,000 residents.
A:
the 50 most populous U.S. cities