Assertion: joker's foe | /r/HasProperty | the riddler
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Source sentences:
text: Other long-time recurring foes that are part of Batman's rogues gallery include Catwoman (a cat burglar anti-heroine who is an occasional ally and romantic interest), the Penguin, Ra's al Ghul, Two-Face, the Riddler, the Scarecrow, Mr. Freeze, Poison Ivy, Harley Quinn, Bane, Clayface, and Killer Croc, among others.