5420
It was this type of derivative that investment magnate Warren Buffett referred to in his famous 2002 speech in which he warned against " financial weapons of mass destruction " .
 person: Warren Buffett
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: Warren Buffett 
Answer:
 person: Warren Buffett