Given the 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. Mark O'Halloran -  Mark O'Halloran is an Irish scriptwriter and actor. He is a native of Ennis County Clare. He has written award-winning screenplays for the films Adam & Paul (in which he co-starred) and Garage and the RTE mini-series Prosperity.
The answer is:
Artist