What year was the team 8th in the season and made it to the 3rd round in Open Cup?
CREATE TABLE "year_by_year" (
  "year" real,
  "division" text,
  "league" text,
  "reg_season" text,
  "playoffs" text,
  "open_cup" text,
  "avg_attendance" text
);
SELECT "year" FROM "year_by_year" WHERE "reg_season"='8th' AND "open_cup"='3rd round';