178796
From 2000 to 2009 , his photographs were exhibited at the Photographic Resource Center in Boston ( United States ) , at the State Russian Museum in Saint-Petersburg , and at the Affordable Art Fair in London .
 location: Boston
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: Boston 
Answer:
 location: Boston