user: Question: Name the lowest year for 12th position
Columns: ['Year', 'Competition', 'Venue', 'Position', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2006.0, 'World Junior Championships', 'Beijing , China', '2nd', '5000 m']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Position" = '12th';