5014
Obama administration explores direct talks with Iran over deteriorating situation in Iraq , U . S . officials say . http://t.co/rZhsP1J2p3
 person: Obama; location: Iran; location: Iraq; location: U . S .
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: Obama, Iran, Iraq, U . S . 
Answer:
 person: Obama; location: Iran; location: Iraq; location: U . S .