Complex sentence: In the TV series "Logan's Run", the city is under the control of the "cabal of elderly citizens", a council made up of elite citizens of the city who have been given the privilege to live beyond the age of 30.
Split into simpler sentences: In the TV version of Logan's Run, the city is under the control the cabal of elderly citizens. The council is made of Elite citizens of the city who have been given the privilege to live beyond the age of 30.