user: Question: What year was Jeff Mullins?
Columns: ['Year', 'Winner', 'Jockey', 'Trainer', 'Owner', 'Distance (Miles)', 'Time']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2011.0, 'Rahystrada', 'Sheldon Russell', 'Byron Hughes', 'Robert Courtney', '1-3/16', '1:54.68']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Trainer" = 'Jeff Mullins';