Question: What American statesman and a retired four-star general in the United States Army has attended events at the Southern Center for International Studies? 
Sentence (from "Peter Schoomaker"): Peter Jan Schoomaker (born February 12, 1946) is a retired four-star general of the United States Army and served as the 35th Chief of Staff of the United States Army from August 1, 2003 to April 10, 2007.
Relevant evidence: No