With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Arkham Asylum's patients include the Riddler.
text_B: The Elizabeth Arkham Asylum for the Criminally Insane , typically called Arkham Asylum or simply Arkham -LRB- -LSB- ˈɑrkəm -RSB- -RRB- , is a fictional psychiatric hospital appearing in American comic books published by DC Comics , commonly in stories featuring the superhero Batman .. DC Comics. DC Comics. psychiatric hospital. psychiatric hospital. superhero. superhero. Batman. Batman. Arkham Asylum first appeared in Batman # 258 -LRB- October 1974 -RRB- , written by Dennis O'Neil with art by Irv Novick .. Dennis O'Neil. Dennis O'Neil. Irv Novick. Irv Novick. Batman. Batman. Arkham Asylum serves as a psychiatric hospital for the Gotham City area and houses many patients who are criminally insane .. psychiatric hospital. psychiatric hospital. Gotham City. Gotham City. Arkham 's high-profile patients are often from Batman 's rogues gallery , such as the Joker , Two-Face , Poison Ivy , the Riddler , Harley Quinn , Clayface , Mad Hatter , Killer Croc , Mr. Freeze , and Scarecrow .. Batman. Batman. rogues gallery. List of Batman Family enemies#Classic Rogues Gallery. the Joker. Joker ( character ). Two-Face. Two-Face. Poison Ivy. Poison Ivy ( comics ). the Riddler. Riddler. Harley Quinn. Harley Quinn. Clayface. Clayface. Mad Hatter. Mad Hatter ( comics ). Killer Croc. Killer Croc. Mr. Freeze. Mr. Freeze. Scarecrow. Scarecrow ( DC Comics )
related.