Complex sentence: In 1989, Behar left CBS to run EMI's new Latin division.That same year, Behar, together with the new head of Sony Music Latin, watched Selena perform at the 1989 Tejano Music Awards.
Split into simpler sentences: In 1989, Behar left CBS to run EMI's new Latin division. Behar of newly formed label EMI Latin Records, together with the new head of Sony Music Latin, watched Selena perform at the 1989 Tejano Music Awards.