 Complete the following phrase:  The aquarium was named after Karel Willem Benjamin Van Kleef who was Dutch but resided in Singapore in the 19th and early 20th century. When Van Kleef died in the Netherlands in 1930, he donated a sum of 160,000 equivalent to 8.985 million in 2014, his entire fortune, to the Singaporean government. After some considerations, it was decided in 1933 that the best option was to build an aquarium. In 1935, a site on Fort Canning Hill between Tank Road and River Valley Road was chosen as the site for the aquarium. Construction started in 1940, but it was interrupted by the 