Complex sentence: Jill and her brother F.T. originally applied for Season 1, but after F.T was killed in 9/11, John Vito and Jill applied in remembrance of him.
Split into simpler sentences: Jill and her brother F.T. originally applied for Season 1. Later, her brother was killed in 9/11 and John Vito and Jill applied in remembrance of him.