73315
He studied at Beckenham art school from 1936 , and served in the RAF as a rear gunner on bombers during the Second World War .
 location: Beckenham; organization: RAF
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: Beckenham, RAF 
Answer:
 location: Beckenham; organization: RAF