11577
At the 1968 Summer Olympics in Mexico City , he won the 1500 metres gold medal ( defeating American favourite and world record holder Jim Ryun by 20 metres , the largest winning margin in the history of the event ) and 5000 m silver medal .
 location: Mexico City; person: Jim Ryun
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: Mexico City, Jim Ryun 
Answer:
 location: Mexico City; person: Jim Ryun