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Elena Dementieva was the defending champion , but lost in the quarterfinals to Venus Williams .
 person: Elena Dementieva; person: Venus Williams
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Elena Dementieva, Venus Williams 
Answer:
 person: Elena Dementieva; person: Venus Williams