With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: U2's second album was their first number one in the UK.
text_B: Major Jean-Baptiste Boukary Lingani -LRB- died 19 September 1989 -RRB- was an officer of the Army of the Republic of Upper Volta , who participated in the government led by Thomas Sankara , and subsequently participated in Sankara 's overthrow and death .. Army. Military of Burkina Faso. Republic of Upper Volta. Republic of Upper Volta. Thomas Sankara. Thomas Sankara. He was himself purged not long afterwards .
not_related.