Complex sentence: In the short, Widowmaker is featured on a rooftop plotting to assassinate Tekhartha Mondatta, the head of the Shambali, an in-universe group of omnics formed to bring peace between omnics and humans.
Split into simpler sentences: In the short, Widowmaker is featured on a rooftop plotting to assassinate Tekhartha Mondatta. Mondatta is the head of the Shambali, an in-universe group of omnics formed to bring peace between omnics and humans.