CREATE TABLE table_name_30 (venue VARCHAR, result VARCHAR, extra VARCHAR)

what is the venue when the result is 2nd and extra is 4 x 100 m relay?
SELECT venue FROM table_name_30 WHERE result = "2nd" AND extra = "4 x 100 m relay"
SELECT "venue" FROM "table_name_30" WHERE "2nd" = "result" AND "4 x 100 m relay" = "extra"