Complex sentence: Alison Scott (Katherine Heigl) is a career-minded woman who has just been given an on-air role with E!, and is living in the pool house with her sister Debbie's (Leslie Mann) family.
Split into simpler sentences: Alison Scott (Katherine Heigl) is a career-minded woman who has just been given an on-air role with E! Entertainment Television, and is living in the pool house with her sister Debbie's (Leslie Mann) family.