CREATE TABLE table_2581397_4 (distance VARCHAR2, weight__kg_ VARCHAR2, winner_2nd VARCHAR2)

What was the distance in the race where the weight in kg was 56 and the winner/2nd was 2nd - Fritz?
SELECT distance FROM table_2581397_4 WHERE weight__kg_ = "56" AND winner_2nd = "2nd - Fritz"
SELECT "distance" FROM "table_2581397_4" WHERE "2nd - Fritz" = "winner_2nd" AND "56" = "weight__kg_"