172563
[ 4 ] Famous unsolved spy cases were reenacted during the 2008 conference that featured Washington Post associate editor and espionage novelist David Ignatius as the keynote speaker .
 organization: Washington Post; person: David Ignatius
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: Washington Post, David Ignatius 
Answer:
 organization: Washington Post; person: David Ignatius