Question: The "Deepwater Horizon" oil spill for which Peter V. Neffenger was the Deputy Nation Incident Commander, killed how many people in total?
Sentence (from "Peter V. Neffenger"): He previously had served as Deputy Commandant for Operations, Deputy National Incident Commander for the 2010 "Deepwater Horizon" oil spill, Director of Coast Guard Strategic Management and Doctrine, Commander of the Ninth Coast Guard District, Commander of Coast Guard Sector Los Angeles - Long Beach, Captain of the Port and Federal Maritime Security Coordinator, Budget Officer of the Coast Guard, and Coast Guard Liaison Officer to the Territory of American Samoa.
Relevant evidence: Yes