Complex sentence: Bad Cop tracks down Emmet, Wyldstyle, and Virtruvius, who are rescued by Wyldstyle's boyfriend, Batman, who takes them to a meeting of the remaining Master Builders.
Split into simpler sentences: Bad Cop tracks down Emmet, Wyldstyle, and Virtruvius. They are rescued by Wyldstyle's boyfriend, Batman, who takes them to a meeting of the remaining Master Builders.