Complex sentence: It is an unrelated sequel to the 1989 film "Cyborg", although footage from the original is used in a dream sequence and is also Angelina Jolie's film debut in a starring role (she had previously made one earlier film as a child actress).
Split into simpler sentences: It is an unrelated sequel to the 1989 film "Cyborg", although footage from the original is used in a dream sequence. It was also Jolie's film debut in a starring role (she had previously made an earlier film as a child actress).