With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: On April 12, 1980, William R. Tolbert Jr. died.
text_B: William Richard Tolbert Jr. -LRB- May 13 , 1913 -- April 12 , 1980 -RRB- was the 20th President of Liberia from 1971 until 1980 , when he was killed in a coup d'etat led by Samuel Doe .. 20th. President of Liberia#List of Presidents of Liberia. Samuel Doe. Samuel Doe. Liberia. Liberia. 20th President. President of Liberia#List of Presidents of Liberia. coup d'etat. coup d'etat. Trained as a civil servant , he entered the country 's House of Representatives in 1943 for the True Whig Party , then the only established party in the country .. True Whig. True Whig. civil servant. civil servant. He was elected Vice president to William Tubman in 1952 and served in that position until he became President following Tubman 's death in 1971 .. William Tubman. William Tubman. Vice president. Vice-President of Liberia
related.