With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Shakira founded a hospital.
text_B: Titanium metallic discoloration has been reported to have occurred with titanium-containing ointment causing papules on the penis of a patient .. Titanium screws used for orthopedic procedures , if they come near the skin , can also causes cutaneous blue-black hyperpigmentation .
not_related.