CREATE TABLE table_22949 ("Round" FLOAT, "Date" TEXT, "City and venue" TEXT, "Winner" TEXT, "Runner-up" TEXT, "3rd placed" TEXT, "4th placed" TEXT, "Results" TEXT)

Where did Grzegorz Walasek place 4th?
SELECT "City and venue" FROM table_22949 WHERE "4th placed" = 'Grzegorz Walasek'
SELECT "City and venue" FROM "table_22949" WHERE "4th placed" = 'Grzegorz Walasek'