CREATE TABLE table_64749 ("Year" FLOAT, "Competition" TEXT, "Venue" TEXT, "Position" TEXT, "Notes" TEXT)

What venue had a competition of World Junior Championships before 2011?
SELECT "Venue" FROM table_64749 WHERE "Year" < '2011' AND "Competition" = 'world junior championships'
SELECT "Venue" FROM "table_64749" WHERE "Competition" = 'world junior championships' AND "Year" < '2011'