Question: Name the operator of casinos and racetracks, based in Wyomissing who own the Plainridge Park Casino in Massachusetts?
Context: Hollywood Park, later sold and referred to as Betfair Hollywood Park, was a thoroughbred race course located in Inglewood, California, about 3 miles (5 km) from Los Angeles International Airport and adjacent to the Forum indoor arena.  In 1994 Hollywood Park Casino, with a poker card room, was added to the racetrack complex.  Horse racing and training were shut down in December 2013 though the casino operations continued while a new state of the art casino building opened in October 2016. Hollywood Park Casino is a casino and sports bar in Inglewood, California.  Originally part of the Hollywood Park Racetrack, the casino moved to a new building in 2016 after the closure and demolition of the racetrack in 2013. Casinos Austria, formed in 1967 and based in Austria, is a gaming corporation that owns and operates casinos around the globe.  It is one of the largest casino operators in the world.  Casinos Austria together with its partners operate in about 40 land-based casinos in 16 countries, 8 shipboard casinos, 15 slot parlors, a range of lottery products in Argentina, and one online gambling platform.  Together the CAI (Casinos Austria International) Group’s gaming entertainment operations feature over 750 gaming tables and 7,600 gambling machines. Western Playland is a 30 acre amusement park located in Sunland Park, New Mexico.  It was located in Ascarate Park in El Paso, Texas from 1960 until 2006, but after conflicts with El Paso County, owner Pat Thompson decided to move it to Sunland Park where the owner of Sunland Park Casino donated land right across from his casino. The Central Park Casino, originally the Ladies Refreshment Salon, was a restaurant near East 72nd Street, in Central Park in New York City.  The name of the building came from the Italian for "little house"; the Casino itself was not a gambling business.  Built in 1864, the restaurant was once intended for unaccompanied female visitors to Central Park, but was soon patronized by both men and women.  While the building that housed the Casino belonged to the City of New York, the City often leased the Casino to independent operators.  Mayor Jimmy Walker exercised this power in 1929 by terminating the lease of C.F. Zittel, allowing Walker's friend, Sidney Solomon, to transform the Casino into one of New York's most expensive nightclubs.  Besides entertaining elite guests in the restaurant, Walker had an office in the Casino and conducted city administration there while meeting with political cronies. Following permission from the Federal Government to issue a casino licence and despite strong opposition from Dr Hector Kinloch of the Residents Rally, Casinos Austria International was selected by the ACT Government as the preferred operator on 31 January 1992.  A subsidiary company, Casino Canberra Limited was formed for this purpose.  In exchange for the licence, Casinos Austria paid $19 million up front for lease of the land and an annual $500,000 licensing fee.  A temporary casino began operation on 14 November 1992 at the National Convention Centre.  The permanent casino opened on 29 July 1994.  Former Prime Minister Bob Hawke and the ACT Chief Minister Rosemary Follett were among the guests at the large opening party hosted by Dr Leo Walner, then head of Casinos Austria.  Bob Hawke was the winner of the golden roulette ball that was used for the first spin of the roulette wheel in the temporary casino. Plainridge Park Casino is a harness racing track and slot machine parlor in Plainville, Massachusetts, owned and operated by Penn National Gaming. Station Casinos is a gaming company based in the Las Vegas suburb of Summerlin, Nevada, founded by Frank Fertitta, Jr. Station Casinos, along with Affinity Gaming, Boyd Gaming, and American Casino & Entertainment Properties, dominate the locals casino market in Las Vegas.  The company purchased several sites that were gaming-entitled, meaning that major casinos can be built at that location without additional approvals.  There are only a limited number of such sites available in the Las Vegas area.  Station has also branched out into managing casinos that they do not own.  Red Rock Resorts, Inc. () is a publicly traded holding company that owns a portion of Station Casinos. The Schenley Park Casino was Pittsburgh’s first multi-purpose arena.  The facility was considered the envy of the sports and entertainment world during the early 1890s, with amenities that were unsurpassed anywhere on the globe.  It was built at the entrance to Schenley Park in Oakland near the Phipps Conservatory, the Schenley Bridge and the Carnegie Library of Pittsburgh.  The University of Pittsburgh’s Frick Fine Arts Building currently sits on the site of the Casino.  The Casino was the first place in Pittsburgh where organized ice hockey was played.  The arena's artificial ice surface was the first of its kind in North America. Penn National Gaming, Inc. is an operator of casinos and racetracks, based in Wyomissing, Pennsylvania.  As of 2012, it owns and operates 26 facilities in 18 states, and manages one casino in Canada.
Answer: Penn National Gaming