SELECT "Losing bonus" FROM table_36975 WHERE "Points for" = '571'
What is the Losing bonus of 571 Points ?
CREATE TABLE table_36975 (
    "Club" text,
    "Played" text,
    "Drawn" text,
    "Lost" text,
    "Points for" text,
    "Points against" text,
    "Tries for" text,
    "Tries against" text,
    "Try bonus" text,
    "Losing bonus" text,
    "Points" text
)