With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mariah Carey is British.
text_B: Amy Elizabeth Biehl -LRB- April 26 , 1967 -- August 25 , 1993 -RRB- was a white American graduate of Stanford University and an Anti-Apartheid activist in South Africa who was murdered by black Cape Town residents while a black mob shouted anti-white slurs .. South Africa. South Africa. Stanford University. Stanford University. Anti-Apartheid activist. Anti-Apartheid Movement. The four men convicted of her murder were released by the Truth and Reconciliation Commission .. Truth and Reconciliation Commission. Truth and Reconciliation Commission ( South Africa )
not_related.