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On 7 June 2011 , he attended the state dinner hosted by President Barack Obama in honor of Chancellor Angela Merkel at the White House .
 person: Barack Obama; person: Angela Merkel; location: White House
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Barack Obama; person: Angela Merkel; location: White House