St. Mark's School (Massachusetts) - St. Mark's School is a coeducational Episcopal preparatory school situated on 250 acres (1.0 km2) in Southborough Massachusetts 25 miles (40 km) from Boston. It was founded in 1865 as an all-boys school by Joseph Burnett a wealthy native of Southborough who developed and marketed the world-famous Burnett Vanilla Extract [1]. Girls have attended since the 1970's. St. 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:
Educational Institution