Question: The first female officer to command a major Unified Combatant Command in the United States Armed Forces succeeded a Navy admiral who served as the 23rd commander of what?
Sentence (from "William E. Gortney"): He previously served as the Commander, U.S. Fleet Forces Command from September 14, 2012 to December 2014 and Director of the Joint Staff from July 1, 2010 to August 2012.
Relevant evidence: No