Premise: William Richard Tolbert Jr. ( May 13 , 1913 -- April 12 , 1980 ) was the 20th President of Liberia from 1971 until 1980 , when he was killed in a coup d'état led by Samuel Doe .
Hypothesis: William R. Tolbert Jr. was killed in a coup d'état led by Samuel Doe.
Label: ENTAILMENT