In which year was the Tournament of european indoor championships played where the Extra was 800 m and the Result was 2nd?
CREATE TABLE "achievements" (
  "year" real,
  "tournament" text,
  "venue" text,
  "result" text,
  "extra" text
);
SELECT "year" FROM "achievements" WHERE "extra"='800 m' AND "tournament"='european indoor championships' AND "result"='2nd';