Question: The famous publisher of Zenith Comics, Barry Johns, was kidnapped from which multi-genre entertainment and comic convention held annually in San Diego, California?
Sentence (from "The Last Laugh (The Hardy Boys)"): The famous publisher of Zenith Comics, Barry Johns, is kidnapped from the San Diego comic-book convention by characters "Human Dreadnought" and "Flame Fiend", observed by the Hardys.
Relevant evidence: Yes