Question: How many schools are in the league that the Penn Quakers compete in?

<P0-S0> The Penn–Princeton basketball rivalry is an American college basketball rivalry between the Penn Quakers men's basketball team of the University of Pennsylvania and Princeton Tigers men's basketball team of Princeton University. <P0-S1>  Having been contested every year since 1903, it is the third oldest consecutively played rivalry in National Collegiate Athletic Association Division I history. <P0-S2>  Unlike many notable college basketball rivalries, such as Carolina–Duke, which involves teams that often both get invited to the same NCAA tournaments, Notre Dame–UCLA, which involves geographically remote teams, Illinois–Missouri, which involves non-conference rivals, or Alabama–Auburn, which takes a back seat to the football rivalry, this is a rivalry of geographically close, conference rivals, who compete for a single NCAA invitation and consider the basketball rivalry more important than other sports rivalries between the schools. <P0-S3>  A head-to-head contest has been the final regularly scheduled game of the Princeton season every year since 1995. <P0-S4>  Between 1963 and 2007, Princeton or Penn won or shared the Ivy League conference championship every season except 1986 and 1988. <P0-S5>  The other seasons in which neither team won or shared the Ivy League title are 1957, 1958, 1962, 2008–10, and 2012-2016. <SEP> <P1-S0> The 1909 Penn Quakers football team represented the University of Pennsylvania in the 1909 college football season. <P1-S1>  The Quakers finished with a 7–1–2 record in their first year under head coach and College Football Hall of Fame inductee, Andy Smith. <P1-S2>  Their only loss was to Michigan by a 12 to 6 score, a game that snapped Penn's 23-game winning streak and marked the first time a Western team had defeated one of the "Big Four" (Harvard, Yale, Princeton and Penn). <P1-S3>  Other significant games included a 12 to 0 victory over West Virginia, a 3-3 tie with Penn State, a 29 to 6 victory over Carlisle, and a 17 to 6 victory over Cornell. <P1-S4>  They outscored their opponents by a combined total of 146 to 38. <P1-S5>  End Harry Braddock was the only Penn player to receive All-America honors in 1909, receiving second-team honors from Walter Camp. <SEP> <P2-S0> The Ivy League is a collegiate athletic conference comprising sports teams from eight private institutions of higher education in the Northeastern United States. <P2-S1>  The conference name is also commonly used to refer to those eight schools as a group beyond the sports context. <P2-S2>  The eight institutions are Brown University, Columbia University, Cornell University, Dartmouth College, Harvard University, the University of Pennsylvania, Princeton University, and Yale University. <P2-S3>  The term "Ivy League" has connotations of academic excellence, selectivity in admissions, and social elitism. <SEP> <P3-S0> The Penn Quakers football team is the college football team at the University of Pennsylvania in Philadelphia, Pennsylvania. <P3-S1>  The Penn Quakers have competed in the Ivy League since its inaugural season of 1956, and are currently a Division I Football Championship Subdivision (FCS) member of the National Collegiate Athletic Association (NCAA). <P3-S2>  Penn has played in 1,364 football games, the most of any school in any division. <P3-S3>  Penn plays its home games at historic Franklin Field, the oldest football stadium in the US. <P3-S4>  All Penn games are broadcast on WNTP or WFIL radio.