SCHEMA:
CREATE TABLE table_2581397_4 (distance VARCHAR, weight__kg_ VARCHAR, winner_2nd VARCHAR)
USER:
What was the distance in the race where the weight in kg was 56 and the winner/2nd was 2nd - Fritz?

QUERY:
SELECT distance FROM table_2581397_4 WHERE weight__kg_ = "56" AND winner_2nd = "2nd - Fritz"