Question: Bowling has been part of the pan american games since the games held in which city ?

Context paragraphs:
Boxing at the Pan American Games: Boxing has been contested at every Pan American Games since the first edition of the games in 1951.  The 2007 Pan American Games was the final games with boxing as a male-only event.  The 2011 Pan American Games included women's boxing in the program for the first time.

2015 Pan American Games: The 2015 Pan American Games, officially the XVII Pan American Games and commonly known as the Toronto 2015 Pan-Am Games (French: "Jeux panaméricains de 2015 à Toronto" ), were a major international multi-sport event celebrated in the tradition of the Pan American Games, as governed by Pan American Sports Organization (PASO).  The games were held from July 10 to 26, 2015 in Toronto, Ontario, Canada; preliminary rounds in certain events began on July 7, 2015.  These were the third Pan American games hosted by Canada, and the first in the province of Ontario.  The Games were held at venues in Toronto and seventeen other Golden Horseshoe communities.  The Pan American Games and 2015 Parapan American Games were organized by the Toronto Organizing Committee for the 2015 Pan and Parapan American Games (TO2015).

Equestrian at the Pan American Games: Equestrianism made its Pan American Games debut at the first Pan American Games in 1951 in Buenos Aires, Argentina.  It has appeared at every Pan American Games since.  The current Pan American Games equestrian disciplines are Dressage, Eventing, and Jumping.  In each discipline, both individual and team medals are awarded.  Women and men compete together on equal terms.

1991 Pan American Games: The 11th Pan American Games were held in Havana, Cuba from August 2 to August 18, 1991.  There were 4,519 athletes from 39 countries of the PASO community, with events in 33 different sports.  The main stadium was the Estadio Panamericano, a multi-use stadium in Havana that holds 50,000 people.

Bowling at the Pan American Games: Bowling — primarily in the form of the tenpin sport, as regulated by the World Bowling organization (the Pan American Games' tenpin events are governed by World Bowling's "PABCON" American Zone division), has been a sport at the Pan American Games since the 1991 Pan American Games.

Antigua and Barbuda at the Pan American Games: Antigua and Barbuda has competed at every edition of the Pan American Games since the seventh edition of the multi-sport event in 1979.  However, Antigua and Barbuda participated in the 1959 Pan American Games as part of the British West Indies and future Prime Minister Lester Bird won a bronze medal in the long jump.  Sprinter Heather Samuel won Antigua and Barbuda's first Pan Am medal in 1995, a bronze in the women's 100 metres.  Sprinter, Brendan Christian won Antigua and Barbuda's first gold medal at the 2007 Pan American Games.  To date, all five of Antigua and Barbuda's medals have been won in the sport of track and field.  Antigua and Barbuda did not compete at the first and only Pan American Winter Games in 1990.

Mexico at the 2011 Pan American Games: Mexico hosted the 2011 Pan American Games in Guadalajara, Mexico from October 14 to 30, 2011.  Mexico has competed in every edition of the Pan American Games since the first games held in Buenos Aires, Argentina.  Mexico began their participation having achieved 782 medals in total with 155 of them gold.  In August 24, 2011 the head of CONADE, Bernardo de la Garza stated that the Mexican athletes would look to break the country's historic record of achieving 23 gold medals in a single Games, which happened at the 1995 Pan American Games in Mar del Plata, Argentina.  For that specific objective, the Mexican delegation has landed its hopes on the disciplines of diving, taekwondo, archery, racquetball, basque pelota, and athletics, most specifically in the athletes: Paola Espinosa, Paola Longoria, Alberto Rodríguez, Eder Sánchez, Damián Villa, Yahel Castillo, and Juan René Serrano (flagbearer), who are the strongest possibilities of winning a gold medal in their respective disciplines.

Racquetball at the Pan American Games: Racquetball has been part of the Pan American Games since 1995 Games in Mar del Plata, Argentina, although it was not included in the 2007 Games.  Racquetball was again included in the 2011 Pan American Games in Guadalajara, Mexico, and the 2015 Pan American Games in Toronto, Ontario.  Racquetball is on the program for the 2019 Pan American Games in Lima, Peru.  The United States dominated the racquetball events in the first three games, but Mexico has been the dominant country in the last two games.

Canada at the Pan American Games: Canada has competed at every edition of the Pan American Games since the second edition of the multi-sport event in 1955.  As of the last Pan American Games in 2015, Canada is third on the all time medals list, only behind the United States and Cuba.  Canada is also one of nine countries to have competed at the only Winter Pan American Games, and only of one two (the other being the United States) to win a medal at the games.

2011 Pan American Games: The 2011 Pan American Games, officially the XVI Pan American Games, was an international multi-sport event that was held from October 14–30, 2011, in Guadalajara, Jalisco, Mexico.  Some events were held in the nearby cities of Ciudad Guzmán, Puerto Vallarta, Lagos de Moreno and Tapalpa.  It was the largest multi-sport event of 2011, with approximately 6,000 athletes from 42 nations participating in 36 sports.  Both the Pan American and Parapan American Games were organized by the Guadalajara 2011 Organizing Committee (COPAG).  The 2011 Pan American Games were the third Pan American Games hosted by Mexico (the first country to do so) and the first held in the state of Jalisco.  Previously, Mexico hosted the 1955 Pan American Games and the 1975 Pan American Games, both in Mexico City.  The 2011 Parapan American Games were held 20 days after the Pan American Games have ended.

Supporting paragraphs: Bowling at the Pan American Games 1991 Pan American Games
Answer: Havana, Cuba