Complex sentence: Flash agrees and reveals that he has called in someone who can teach Jessica about rings and willpower when a skeptical Jessica asks Flash who could possible help her, Hal Jordan reveals himself and states that he has come to teach Jessica how to stay in control.
Split into simpler sentences: Flash agrees and reveals that he has called in someone who can teach Jessica about rings and willpower. When a skeptical Jessica asks Flash who could possible help her, Hal Jordan reveals himself and states that he has come to teach Jessica how to stay in control.