Complex sentence: Inside Frank's body, Osmosis "Ozzy" Jones (Chris Rock), an agent of the FPD, is a funny, adventure-seeking white blood cell and a rebel cop, frequently disobeying authority to do what he thinks is right.
Split into simpler sentences: Inside Frank's body, Osmosis "Ozzy" Jones (Chris Rock), an agent of the FPD, is a funny, adventure-seeking white blood cell. He is a rebel cop, frequently disobeying authority to do what he thinks is right.