With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nina Simone received an honorary degree from the Curtis Institute of Music in Philadelphia.
text_B: The Penasquito Polymetallic Mine is the fifth largest silver mine in the world and the second largest in Mexico .. silver. silver. It is located in north-eastern corner of the State of Zacatecas and is wholly owned by the Canadian company Goldcorp through a Mexican subsidiary , Minera Penasquito , S.A. de C.V. .. State of Zacatecas. Zacatecas. Goldcorp. Goldcorp. It is an open pit operation which began operations in March 2010 , but still managed to produce 13,952,600 ounces of silver that year .. open pit. open pit. silver. silver. Estimated reserves for the Penasquito Mine are 17.82 million oz of gold , 1,070.1 million oz of silver , 3,214 tons of lead and 7,098 million tons of zinc .. silver. silver. gold. gold. lead. lead. zinc. zinc
not_related.