Complex sentence: In order to accomplish this, similar to a 2009 summit organized by Denning, IEEE Rebooting Computing hosted three summits between 2013 and 2014 in Washington, D.C., and Santa Cruz, California addressing the future of computing from a holistic point of view.
Split into simpler sentences: In order to accomplish this, IEEE Rebooting Computing hosted three summits between 2013 and 2014 in Washington, D.C., and Santa Cruz, California. Similar to a 2009 summit organized by Denning, these summits addressed the future of computing from a holistic point of view.