91215
History Michael Flett , who has been a member of the New York Mercantile Exchange since 1996 , began his career as an energy broker .
 organization: New York Mercantile Exchange
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: New York Mercantile Exchange 
Answer:
 organization: New York Mercantile Exchange