Complex sentence: He tortures one of Waller's men into leading him to the facility where the nano bombs used to control the criminals are manufactured, and threatens one of the scientists there to disable the bomb implanted in Harley's neck.
Split into simpler sentences: He tortures one of Waller's men into leading him to the facility where the nano bombs used to control the criminals are manufactured. The Joker then threatens one of the scientists involved in the program to disable the bomb implanted in Harley's neck.