Complex sentence: It is the fourth installment of the live-action "Transformers" film series and is a stand-alone sequel to 2011's', while also serving as a soft reboot of the franchise, taking place five years after its events.
Split into simpler sentences: It is the fourth installment of the live-action "Transformers" film series. It serves as a stand-alone sequel to 2011's', taking place five years after its events.