Task: Question Answering
Input (English): Passage: Australia deployed approximately three battalions of infantry, one regiment of Centurion tanks, three RAAF Squadrons (2SQN Canberra Bombers, 9SQN Iroquois Helicopters and 35 SQN Caribou Transports), 2 batteries of Royal Australian Artillery and a Special Air Service Regiment (SASR) team. The Royal Australian Navy (RAN) performed a variety of operational tasks at sea, ashore and in the air. The 1st Australian Task Force consisted of Army, Navy and Air Force personnel and commanded all Australian operations from 1966 until 1972. 1st Australian Logistic Support Group (1 ALSG) was 1 ATFs ground support unit, composed of engineer, transport, ordnance, medical and service corps units. Australian Army training teams followed the withdrawal of combat forces in 1971. According to the Australian Government Nominal Roll of Vietnam Veterans 13 600 members of the Royal Australian Navy, 41720 members of the Australian Army, and 4900 members of the Royal Australian Air Force served in Vietnam from 1962-1975. According to official statistics, 501 personnel died or went missing in action during the Vietnam War and 2400 were wounded. 
Question: How many more Vietnam Veterans were members of the Australian Army than members of the Royal Australian Air Force? 
Answer type: Number 
Output (English): 36820.