user: Question: In which year was the Tournament of European Indoor Championships played where the Extra was 800 m and the Result was 2nd?
Columns: ['Year', 'Tournament', 'Venue', 'Result', 'Extra']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1973.0, 'European Junior Championships', 'Duisburg , West Germany', '1st', '4x400 m relay']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Extra" = '800 m' AND "Tournament" = 'European Indoor Championships' AND "Result" = '2nd';