341810
He undertook research into turbine engine s , working with Sir Harold Roxbee Cox and Sir Frank Whittle .
 person: Harold Roxbee Cox; person: Frank Whittle
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: Harold Roxbee Cox, Frank Whittle 
Answer:
 person: Harold Roxbee Cox; person: Frank Whittle