an Entity references as follows:
Linda de Boer (born 1954) is a retired Dutch swimmer who won the silver medal in the 800 m freestyle at the 1970 European Aquatics Championships. In June 1971 she set a European record of 18 minutes and 3 seconds in the 1500 m freestyle. Between 1969 and 1971 she won two national titles and set 14 national records in the 400 m, 800 m and 1500 m freestyle events. Her daughter, Daniƫlle uit den Boogaard (b. 1983), and possibly son, David uit den Boogaard (b. 1983), also became competitive swimmers and national champions.