Complex sentence: Ayer's directorial debut was with the film "Harsh Times", a drama set on the streets of South Central Los Angeles, showing how drug use and past military experiences affects people's attempts to lead normal lives.
Split into simpler sentences: Ayer's directorial debut was with the film "Harsh Times". It is a drama set on the streets of South Central Los Angeles and shows how drug use and past military experiences affects peoples' attempts to lead normal lives.