Detailed Instructions: In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Q: Passage: Born in Croydon, London, Clohessy began his career with Arsenal, where he progressed through the club's academy system. He competed with Kerrea Gilbert for the right-back position in the youth and reserve team. Clohessy moved to Gillingham in 2005 to continue his development, as he went on to make his professional debut in a Football League Trophy tie with Wycombe Wanderers on 22 November 2005. He played for 104 minutes in the match which ended 31 to Wycombe following a penalty shoot-out. The score after normal time was 22. He made his Football League debut four days later as Gillingham fell to a 50 defeat to Colchester United. He didn't feature for the club for one month until he came on as a half-time substitute for Jon Wallis on 26 December in a 11 draw with Bristol City. He scored his first professional goal on 31 December, netting the second goal in a 30 win over Milton Keynes Dons at Priestfield.
Link Information: Jonathan Kevin Wallis (born 4 April 1986 in Gravesend) is an English footballer.

Career.He progressed through the youth ranks at Gillingham and signed his first professional contract, at the beginning of the 200506 season Answer: 2005
A:
When did the player Clohessy substituted for on 26 December begin his professional career?