context: Food preparation item location is not grave. Main artery location is school. Chimney location is small dog house. Backpack location is school. Food preparation item location is kitchen. Knife location is backpack. Eraser location is school. Main artery location is small dog house. Saucepan location is kitchen. Main artery location is backpack. Rope location is backpack. Kitchen location is knife. Food preparation item location is not hall.
text: Knife location is not school.