Question: What were the dates of the Pan American Games in which Roman Gastaldi competed two years prior to competing in the World Championships in Moscow?

Context articles: Daniele Hypólito
Federico Grabich
Antigua and Barbuda at the Pan American Games
Peter Ogilvie
Athletics at the 2011 Pan American Games
Susan Nattrass
Racquetball at the Pan American Games
Román Gastaldi
Olga Karmansky
Nicholas Tritton

Daniele Matias Hypólito (born September 8, 1984) is a Brazilian gymnast who competed in the 2000, 2004, 2008, 2012 and 2016 Olympic Games.
 Hypólito was the first athlete from Brazil ever to win a medal at the World Championships, a silver on floor exercise in 2001.
 She is also the nine-time senior all-around Brazilian National Champion in artistic gymnastics, 2002 South American Games all-around champion and 2003 Pan American Games all-around bronze medalist.
 To date Hypólito has won the Brazilian National Championships more than ten times; has represented Brazil at the World Championships thirteen times, competing in every Worlds meet from 1999 to 2015, except in 2009; has taken part in every edition of the Olympic Games from 2000 to 2016; and has competed at five Pan American Games between 1999 and 2015.
Federico Grabich (born 26 March 1990) is an Argentine competitive swimmer.
 At the 2012 Summer Olympics he finished 41st overall in the heats in the Men's 100 metre backstroke and failed to reach the semifinals.
 Federico won the bronze medal at the 2011 Pan American Games and the gold and silver medal at the 2015 Pan American Games.
 At the South American Games he won ten medals (two of them were gold).
 At the 2015 Pan American Games, Grabich won the 100m Freestyle, setting a new Argentine record.
 He also won a silver medal in 200m, setting another Argentine record.
 In August 2015, he won the bronze medal at the World Championships, being the first medal for his country in a World Championship and the silver medal at the World Cup in Qatar.
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.
Peter Steven Ogilvie (born May 2, 1972) is a retired Canadian sprinter who competed primarily in the 200 metres.
 Growing up in Burnaby, British Columbia, Peter represented Canada at the 1992 and 1996 Summer Olympics, as well as, two outdoor (1991 & 1995), one indoor IAAF World Championships (1993), one Pan American Games (1991) and two Commonwealth Games (1990 & 1994).
 He won a silver medal in the 4 × 100 m relay at the 1991 Pan American Games, a gold medal in the 4 × 100 m relay at the 1994 Francophone Games in Paris, and bronze medal in the 1600m Medley Relay at the 1993 IAAF World Indoor Championships.
Athletics competitions at the 2011 Pan American Games in Guadalajara was held from October 23 to October 30 at the newly built Telmex Athletics Stadium.
 The racewalking and marathon events were held on the temporary Guadalajara Circuit and Route and the Pan American Marathon circuit respectively.
 The sport of athletics is split into distinct sets of events: track and field events, road running events, and racewalking events.
Dr. Susan "Sue" Marie Nattrass, {'1': ", '2': ", '3': ", '4': "} (born November 5, 1950) is a Canadian trap shooter and medical researcher in osteoporosis.
 She was born in Medicine Hat, Alberta.
 Competing at an elite international level from the 1970s through the 2010s, Nattrass has had multiple appearances, in one or both of trap or double trap, at Olympic Games, Commonwealth Games, World Championships, and Pan American Games.
 Nattrass is a repeat World Champion and repeat medalist at the Commonwealth Games, World Championships, and Pan American Games.
 Nattrass was the flag bearer for Canada at the 2007 Pan American Games (and a gold medal winner) and the 2014 Commonwealth 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.
Román Andrés Gastaldi (born 25 September 1989 in Devoto, Córdoba) is an Argentine decathlete.
 He competed at the 2011 Pan American Games in Guadalajara, Mexico and 2013 World Championships in Moscow, Russia.
Olga Karmansky (born (1986--)1 1986 ) is an American individual rhythmic gymnast.
 She represents her nation at international competitions.
 At the 2001 Pan American Gymnastics Championships she won the gold medal in the team all-around, individual all-around and hoop events and the bronze medal in the ball and rope events.
 Karmansky participated at the 2003 Pan American Games where she won two silver medals, in the individual all-around and ball events.
 Just like in 2001 she won the gold medal in the team all-around event at the 2005 Pan American Gymnastics Championships, and further the silver medal in the clubs event and the bronze medal in the ball and ribbon events.
 She competed at world championships, including at the 2005 World Rhythmic Gymnastics Championships.
Nicholas "Nick" Tritton (born July 20, 1984 in Guelph, Ontario) is a male judoka who grew up in the Perth/Lanark area of Ontario Canada.
 Nicholas was a member of Canada's National Team for more than ten years and won many medals domestically and internationally including 13 medals on the Grand Slam, Grand Prix and World Cup circuit including back to back bronze medals at the prestigious Tokyo Grand Slam as well as the bronze medal in the men's lightweight division (– 73 kg) at the 2007 Pan American Games, alongside Cuba's Ronald Girones and another bronze at the 2011 Pan American Games in Mexico.
 He represented Canada in the sport of Judo at the 2008 Summer & 2012 Summer Olympics and at five World Championships.
 He won 5 medals at the Pan American Judo Championships (bronze in 2007, 2008 & 2011, silver in 2009 and gold in 2010 - missed 2012 due to injury).
 He also earned a bronze medal at the 2005 Francophone Games and a silver at the 2009 Francophone Games.