Complex sentence: During the JLI-era, Doomsday causes the death of Superman among others.nUleimately, due to ngul's invasion and destruction of Coast City, Maxwell loses his mother, still residing in their Coast City home.
Split into simpler sentences: During the JLI-era, Doomsday causes the death of Superman among others. Ultimately, due to Mongul's invasion and destruction of Coast City, Maxwell loses his mother, still residing in their Coast City home.