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?
Román Gastaldi: Román Andrés Gastaldi (born 25 September 1989 in Devoto, Córdoba) is an Argentine decathlete. Román Gastaldi:  He competed at the 2011 Pan American Games in Guadalajara, Mexico and 2013 World Championships in Moscow, Russia.
i don't know