premise: Sea Lion Park was a 16 acre amusement park started in 1895 on Coney Island by Paul Boyton. He fenced the property and charged admission, the park becoming the first enclosed and permanent amusement park in North America. Up until the establishment of this park, amusement areas around the country consisted of pay-as-you-go concessions. In 1903, Sea Lion Park was replaced by Luna Park.
hypothesis: It is less than 150 years old
reason: The park was made in 1895, even after becoming Luna in 1903 it is less than 150 years ago.