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The 1993 Llyn Padarn helicopter crash occurred on August 12 , 1993 , when an RAF Westland Wessex helicopter , serial number XR524 , with 3 crew and 4 passengers ( all of them Air Training Corps cadets ) on board suffered a catastrophic tail rotor failure and plunged into Llyn Padarn , a lake in North Wales .
 organization: RAF; organization: Air Training Corps
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: RAF, Air Training Corps 
Answer:
 organization: RAF; organization: Air Training Corps