SELECT "event" FROM table_204_571 GROUP BY "event" ORDER BY COUNT(*) DESC LIMIT 1
which men 's alpine skiing event had the most icelandic competitors ?
CREATE TABLE table_204_571 (
    id number,
    "athlete" text,
    "event" text,
    "race 1\ntime" text,
    "race 2\ntime" text,
    "total\ntime" text,
    "total\nrank" number
)