Please answer the following question: Nancy Sullivan (politician) - Nancy B. Sullivan (born March 27 1949) is an American politician and schoolteacher from Maine. Sullivan served as a Democrat State Senator from Maine's 4th District representing part of York County including the city of Biddeford and the neighboring towns of Kennebunkport Arundel and Kennebunk from 2004 to 2012. She teaches history at Saco Middle School and was inspired to run for office by former State Senator and gubernatorial candidate Libby Mitchell. 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:
Office Holder