With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: American Horror Story refused to work with Sarah Paulson.
text_B: Adastra Minerals Inc -LRB- formerly America Mineral Fields Inc -RRB- , was a London-based mining company with notable operations in central Africa -LRB- Angola , Democratic Republic of Congo , and Zambia -RRB- , particularly in copper , cobalt and zinc exploration .. Angola. Angola. Democratic Republic of Congo. Democratic Republic of Congo. Zambia. Zambia. copper. copper. cobalt. cobalt. zinc. zinc. Adastra 's properties and concessions were acquired in 2006 by First Quantum Minerals for $ 245m in cash and stock , outpacing a counter-offer by Mwana Africa plc. .. First Quantum Minerals. First Quantum Minerals. Mwana Africa plc. Mwana Africa plc. Founder Jean-Raymond Boulle and top UK insurer Prudential plc had owned 10 % and 14 % stakes in Adastra , respectively .
not_related.