Question: What was the ranking, on 2016 Fortune 500 list,  of the insurance company which has Seymour G. Sternberg as its chairman ? 
Sentence (from "Seymour G. Sternberg"): He also sits on the Board of Directors for the United States Chamber of Commerce, Northeastern University, CIT Group Incorporated, the New York City Leadership Academy, and Express Scripts Holdings.
Relevant evidence: No