sentences:  For the summer of 1991, mayor David Dinkins had planned to close all 32 outdoor pools in the city, a decision that was only reversed after a $2 million donation from real estate developer Sol Goldman and $1.8 million from other sources.Additionally, in the 1990s, a practice called "whirlpooling" became common in New York City pools such as Crotona Park, wherein women would be inappropriately fondled by teenage boys.By the turn of the century, crimes such as sexual assaults had decreased in parks citywide due to increased security.