289107
He flew for five years at the Royal Aircraft Establishment at Martlesham Heath , including periods on loan to Blackburn Aircraft and Avro .
 organization: Royal Aircraft Establishment; location: Martlesham Heath; organization: Blackburn Aircraft; organization: Avro
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: Royal Aircraft Establishment, Martlesham Heath, Blackburn Aircraft, Avro 
Answer:
 organization: Royal Aircraft Establishment; location: Martlesham Heath; organization: Blackburn Aircraft; organization: Avro