Please answer the following question: Moon on a Rainbow Shawl - Moon on a Rainbow Shawl is a 1957 play written by Trinidadian actor-playwright Errol John. Described as "ground-breaking" and "a breakthrough in Britain for black writing" the play has been produced and revived worldwide since its premiere at London's Royal Court Theatre. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Written Work