user: Question: Which year did the World Indoor Championships gave a position of 3rd?
Columns: ['Year', 'Competition', 'Venue', 'Position', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1987.0, 'European Junior Championships', 'Birmingham, England', '3rd', '6.39 m (w)']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Competition" = 'World Indoor Championships' AND "Position" = '3rd';