Mike Mitchell is an American artist known for his pop surrealism and for leading the online grassroots movement in supporting Conan O'Brien during the 2010 Tonight Show conflict. He designed the I'm with Coco poster which was based on a photo that went viral on the internet in January 2010. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Artist