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Lost - 2004 Walkabout 1-4 is rated/received certificates of:
Netherlands:12
Portugal:M/12
UK:15
USA:TV-14
Venezuela:PG-13 (DVD rating)
You may be thinking of Walkabout, which was made into a movie.
Walkabout magazine ended in 1974.
Walkabout magazine was created in 1934.
Australian Walkabout was created in 1958.