Complex sentence: Formed in Gary, Indiana in 1964, the group originally included Jackie, Tito, Jermaine, Marlon and Michael.formed the group after performing in an early incarnation called The Jackson Brothers, which originally consisted of a trio of the three older brothers.
Split into simpler sentences: Formed in Gary, Indiana in 1964, the group originally included Jackie, Tito, Jermaine, Marlon and Michael. Formed the group after performing in an early incarnation called The Jackson Brothers, which originally consisted of a trio of the three older brothers.