50272
In 1856 , he became an apprentice in the photography studio of Blanchard P. Paige in D.C. By 1858 , he was working in a studio on Pennsylvania Avenue .
 location: D.C.
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: D.C. 
Answer:
 location: D.C.