Complex sentence: The first dub, created in 1978, received experimental screenings in the United States by TMS, while the next two dubs were created for home releases and were retitled "The Mystery of Mamo" and "Secret of Mamo".
Split into simpler sentences: The first dub, created in 1978, received experimental screenings in the United States by TMS. The next two dubs were created for home releases and were retitled "The Mystery of Mamo" and "Secret of Mamo".