if something is a raw material in a process then that something is required for that process
raw_materials is not tangible_thing. raw_materials is industrial_equipment. raw_materials is not industrial_equipment. construction is not creating_from_raw_materials. creating_from_raw_materials is creation. raw_material is not material. raw_material is material. construction is creating_from_raw_materials. creating_from_raw_materials is not creation. raw_materials is resource.