Information:  - Maarten van der Weijden (born 31 March 1981) is a Dutch long distance and marathon swimmer born in Alkmaar.  - Marcel Reinier Wouda (born 23 January 1972, Tilburg) is a former Dutch swimmer, who became the first Dutch world champion in men's swimming when he won the world title in the 200 m individual medley at the 1998 World Aquatics Championships in Perth, Australia. He was the coach of Olympic champions Maarten van der Weijden and Hinkelien Schreuder at the Nationaal Zweminstituut Eindhoven.  - Joeri Verlinden ( born January 22 , 1988 ) is a Dutch swimmer who specializes in butterfly and freestyle . He is currently trained by Martin Truijens . He was previously trained by Marcel Wouda .  - The 8th FINA World Championships or the 1998 World Aquatics Championships were held from 8 to 17 January 1998 in Perth, Australia. The championships features competition in all five of FINA's disciplines: Swimming, Diving, Water Polo, Synchronized Swimming and Open Water Swimming. The main venue for competition was Challenge Stadium, which hosted all disciplines save Open Water.    Given the information above, choose from the list below the object entity that exhibits the relation 'sport' with the subject 'joeri verlinden'.  Choices: - marathon  - polo  - swimming  - synchronized swimming
A:
swimming