premise: Tremont Street Subway served a light rail station on the MBTA Green Line system, and is located on the southeast corner of Boston Common at the intersection of Boylston Street and Tremont Street.
hypothesis: Boylston is a light rail station on the MBTA Green Line system , and is located on the southeast corner of Boston Common at the intersection of Boylston Street and Tremont Street . The Green Line is a light rail system run by the Massachusetts Bay Transportation Authority ( MBTA ) in the Boston , Massachusetts , metropolitan area .