Premise: Charles Woodruff Yost ( November 6 , 1907 -- May 21 , 1981 ) was a career U.S. diplomat who was assigned as his country 's representative to the United Nations from 1969 to 1971 . The United States Ambassador to the United Nations is the leader of the U.S. delegation , the U.S. Mission to the United Nations .
Hypothesis: Charles Woodruff Yost was a United States Ambassador to the United Nations for two years.
Label: ENTAILMENT