252604
He met Simon Keizer at school when they were 17 years old , at which point they began singing and writing songs together .
 person: Simon Keizer
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: Simon Keizer 
Answer:
 person: Simon Keizer