Complex sentence: During the battle in Coast City, Booster Gold discovers that Doomsday is controlled by General Nathaniel Adam, Booster Gold escapes from Doomsday and then saves a woman named Alexandra Gianopoulos from Doomsday's attack.
Split into simpler sentences: During the battle in Coast City, he discovers that Doomsday is controlled by General Nathaniel Adam. He escapes from Doomsday and then saves a woman named Alexandra Gianopoulos from Doomsday's attack.