Answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Mehmet Tillem -  Mehmet Tillem (born 10 September 1974) is an Australian politician a Labor Party member of the Senate since August 2013.On 21 August Tillem was appointed to David Feeney's former Senate seat by a joint sitting of the Parliament of Victoria. Tillem was an unnsuccessful Senate candidate in the 2013 federal election and his term will expire on 30 June 2014. He is the first Turkish-born member of the Australian parliament.
Answer:
Office Holder