CREATE TABLE table_4627 ("Year" FLOAT, "Competition" CLOB, "Venue" CLOB, "Position" CLOB, "Notes" CLOB)

What venue did the European Championships' 400 m Hurdles take place?
SELECT "Venue" FROM table_4627 WHERE "Notes" = '400 m hurdles' AND "Competition" = 'european championships'
SELECT "Venue" FROM "table_4627" WHERE "Competition" = 'european championships' AND "Notes" = '400 m hurdles'