With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Splash stars an actor.
text_B: Prestwich Hospital was built as an asylum at Prestwich in 1851 , as the second Lancashire County Lunatic Asylum .. asylum. History of psychiatric institutions. Prestwich. Prestwich. By 1900 it had grown into the largest asylum in Europe .. asylum. History of psychiatric institutions. It is now run by Greater Manchester Mental Health NHS Foundation Trust .. Greater Manchester Mental Health NHS Foundation Trust. Greater Manchester Mental Health NHS Foundation Trust
not_related.