4398
In the 100 m freestyle , Ong challenged seven other swimmers in heat four , including fellow two-time Olympians Alexandros Aresti of Cyprus and George Gleason of the Virgin Islands .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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