user: Question: What event was held in Chihuahua, Mexico?
Columns: ['Year', 'Tournament', 'Venue', 'Result', 'Event']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2005.0, 'World Championships', 'Helsinki , Finland', 'DSQ', '50 km']
SQL:

assistant: SELECT "Event" FROM "Table" WHERE "Venue" = 'Chihuahua, Mexico';