With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Harry Potter is a series of novels.
text_B: is a UK company law and UK insolvency law case , which held that a director 's pay and pension was excessive and grossly negligent , and could be recovered after the company went insolvent .. UK company law. UK company law. UK insolvency law. UK insolvency law
not_related.