5170
President Obama will hold a news conference shortly following the U . S . - Africa Leaders Summit . Watch LIVE : http://t.co/FMYfE3B5ot
 person: President Obama; location: U . S .; location: Africa
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: President Obama, U . S ., Africa 
Answer:
 person: President Obama; location: U . S .; location: Africa