6023
He married Steffi Graf on October 22 , 2001 at their Las Vegas home ; the only witnesses were their mothers .
 person: Steffi Graf; location: Las Vegas
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: Steffi Graf, Las Vegas 
Answer:
 person: Steffi Graf; location: Las Vegas