Complex sentence: In 2139, people live in a single city, Mega City, ruled by The Council, crime is dealt with by a special police force, Street Judges, who have the power to act as judge, jury, and executioner of criminals.
Split into simpler sentences: In 2139, people live in a single city, Mega City, ruled by The Council. Crime is dealt with by a special police force, Street Judges, who may act as judge, jury and executioner of criminals.