Context: From 1861 to 1952 Chestnut Hill Academy was an all-male Pre-K through 8th grade independent college preparatory school located in Northwest Philadelphia. The 9th though 12th grades were added, one per year, beginning in the Fall of 1952 with the first High School graduating class in the Spring of 1956. In 2011, CHA merged with its academic partner and neighbor, the all-girls school Springside School. The two schools together are now known as Springside Chestnut Hill Academy., The Delaware Valley is the valley through which the Delaware River flows. By extension, this toponym is commonly used to refer to the Philadelphia metropolitan area ("the [Lower] Delaware Valley Metropolitan Area"), which straddles the Lower Delaware River just north of its estuary., Northwest Philadelphia is a section of the city of Philadelphia, Pennsylvania. The official boundary is Stenton Avenue to the north, the Schuylkill river to the southwest, Northwestern Avenue to the northwest, Roosevelt Boulevard to the south, and Wister Street and Stenton Avenue to the east. The area is divided by Wissahickon Creek into two subsections, Upper Northwest and Lower Northwest Philadelphia. Upper Northwest are Germantown, Mount Airy (which itself is divided into east and west), and Chestnut Hill, and Lower Northwest are Roxborough, East Falls, and Manayunk. The Philadelphia Police Department patrols two districts located within Northwest Philadelphia. The two patrol districts serving Northwest Philadelphia are the 5th and 14th districts., Pennsylvania (Pennsylvania German: "Pennsylvaani"), officially the Commonwealth of Pennsylvania, is a state located in the northeastern and Mid-Atlantic regions of the United States. The Appalachian Mountains run through its middle. The commonwealth borders Delaware to the southeast, Maryland to the south, West Virginia to the southwest, Ohio to the west, Lake Erie and the Canadian province of Ontario to the northwest, New York to the north, and New Jersey to the east., From 1879 to 2010 Springside School was an all - girls school ( pre-K through 12th grade ) in the Chestnut Hill neighborhood , in the Northwest section of Philadelphia in the United States . In 2010 Springside School merged with its academic partner and neighbor , the all - boys school Chestnut Hill Academy . The two schools together are now known as Springside Chestnut Hill Academy . Springside School was the oldest girls ' school in Philadelphia . Historically this school had an exchange program with the Jules - Fils Lycee in Carcassonne , France . It was suspended in 2003 ., Philadelphia is the largest city in the Commonwealth of Pennsylvania and the fifth-most populous city in the United States, with an estimated population of 1,567,442 and more than 6 million in the seventh-largest metropolitan statistical area, . Philadelphia is the economic and cultural anchor of the Delaware Valleya region located in the Northeastern United States at the confluence of the Delaware and Schuylkill rivers with 7.2 million people residing in the eighth-largest combined statistical area in the United States., The Eastern United States, commonly referred to as the American East or simply the East, is a region roughly coinciding with the boundaries of the United States established in the 1783 Treaty of Paris, which bounded the new country to the west along the Mississippi River. It is geographically diverse, spanning the Northeast and Southeast as well as the eastern part of the Central United States., The Northeastern United States, also referred to as the American Northeast or simply the Northeast, is a geographical region of the United States of America bordered to the north by Canada, to the east by the Atlantic Ocean, to the south by the Southern United States, and to the west by the Midwestern United States. The Northeast is one of the four regions defined by the Census Bureau for the collection and analysis of statistics. The Census Bureau-defined region has a total area of with of that being land mass. Though lacking a unified cultural identity, the Northeastern region is the nation's most economically developed, densely populated, and culturally diverse region. Of the nation's four census regions, the Northeast is the second most urban, with 85 percent of its population residing in urban areas, led by the West with 90 percent., Subject: springside school, Relation: located_in_the_administrative_territorial_entity, Options: (A) avenue (B) canada (C) delaware (D) east (E) erie (F) hill (G) maryland (H) most (I) northwest (J) of (K) pennsylvania (L) philadelphia (M) roosevelt (N) south (O) southwest (P) street (Q) the valley (R) united states of america (S) virginia (T) west (U) york
Output: pennsylvania