There are seven state parks within the confines of New York City, including Clay Pit Ponds State Park Preserve, a natural area which includes extensive riding trails, and Riverbank State Park, a 28-acre (110,000 m2) facility that rises 69 feet (21 m) over the Hudson River.
How many meters is Riverbank State Park elevated above the Hudson River?
{'text': '21', 'answer_start': 245}