Complex sentence: On September 3,2016, the Dakota Access Pipeline brought in a private security firm when the company used bulldozers to dig up part of the pipeline route that subject to a pending injunction motion; it contained possible Native graves and burial artifacts.
Split into simpler sentences: On September 3,2016, the Dakota Access Pipeline brought in a private security firm. The company used bulldozers to dig up part of the pipeline route that subject to a pending injunction motion; it contained possible Native graves and burial artifacts.