139431
In 1840 he attended the World 's Anti-Slavery Convention in London where he his portrait was included with other notables in a painting that is now in the National Portrait Gallery in London .
 organization: National Portrait Gallery
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: National Portrait Gallery 
Answer:
 organization: National Portrait Gallery