John-wa [ Mary-ga NAni-o shikago-no furenchi-resutoran-de mawari-no-hito-ni tomerareru-made onaka-ippai tabeta-ka ] i mademo shiritagatteiru ]
what-Acc Chicago-Gen French-restaurant-at surrounding.people-by stopped-until full ate-CompWh
John still wants to know [ what1 Mary ate t1 at the French restaurant in Chicago until she became completely full and was stopped by the people on the scene ].