SELECT "Location" FROM table_75573 WHERE "Event" = 'ecc 8: comeback'
What is the location of the match with an event of ecc 8: comeback?
CREATE TABLE table_75573 (
    "Res." text,
    "Record" text,
    "Opponent" text,
    "Method" text,
    "Event" text,
    "Round" real,
    "Time" text,
    "Location" text
)