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"): Peter V. Neffenger (born 1955) was the Administrator of the Transportation Security Administration from July 2015 till his statutorily required resignation on January 20, 2017 upon Donald Trump becoming President.
Relevant evidence: No