CREATE TABLE table_name_65 (year INT, world_rank VARCHAR, result VARCHAR)

What's the lowest Year with a World Rank of 5th, with a Result greater than 20.31?
SELECT MIN(year) FROM table_name_65 WHERE world_rank = "5th" AND result > 20.31
SELECT MIN("year") FROM "table_name_65" WHERE "5th" = "world_rank" AND "result" > 20.31