The birth city of  Ad Moolhuijzen is home to what zoo?
Ad Moolhuijzen Adrianus ("Ad") Theodorus Moolhuijzen (born April 1, 1943, in Arnhem, Gelderland) is a former water polo player from The Netherlands, who finished in seventh position with the Dutch Men's Team at the 1968 Summer Olympics in Mexico City, Mexico.
Martin Koolhoven Martinus Wouter Koolhoven was born on 25 April 1969 in The Hague in the Netherlands