Ointment cannot have a location of your own backyard. Ointment cannot have a location of town. Build is located at town. Hallway is located at build. Mat cannot have a location of ancient time. Carpet is located at library. Ventilation system is located at your own backyard. Mat cannot have a location of prison cell. Library is located at build. Mat cannot have a location of carpet. Carpet cannot have a location of prison cell.
Mat is located at carpet.