When was the 2014 event in Aspen held in which Amy Sheehan competed? 
Amy Sheehan:  In 2014, she competed at the Winter X Games XVIII in Aspen, and the 2014 Winter Olympics in Sochi, in women's halfpipe. Winter X Games XVIII: Winter X Games XVIII (re-titled Winter X Games Aspen '14; styled as Winter X Games Eighteen in the official logo) were held from January 23 to January 26, 2014, in Aspen, Colorado.
January 23 to January 26, 2014