Question: In which year did John Paul Harvey, a senior officer in the Australian Defence Force, retire following his post as Chief Capability Development Group?
Sentence (from "John Harvey (RAAF officer)"): Air Marshal John Paul Harvey {'1': ", '2': ", '3': ", '4': "} (born 4 September 1954) was a senior officer in the Royal Australian Air Force (RAAF) until his retirement at the end of 2011.
Relevant evidence: Yes