very big 78 / phosphorus are build of of big boundary
81_mm_mortar is not mortar. large_building is not spatial_thing. m120_mortar is not 120mm_mortar. m120_mortar is 120mm_mortar. 81_millimeter_mortar is not mortar. large is size. large_building is spatial_thing. 81_millimeter_mortar is mortar. largeness is size. large is not size.