context: Something cannot have a location of sandbox. Cigarette smoke is located at ballet. Something cannot have a location of freshwater tank. Skyscraper is located at city. Carpet is located at office. Something is located at carpet. Office is located at skyscraper. Cobweb is located at ballet. Cobweb is located at city. Carpet cannot have a location of freshwater tank.
text: Carpet is located at city.