sentences: if something is a raw material in a process then that something is required for that process
docs: baking is creating_from_raw_materials. raw_material is material. raw_materials is resource. construction is creating_from_raw_materials. materials is materials. raw_materials is industrial_equipment. molding is creating_from_raw_materials. recycling is material. creating_from_raw_materials is creation. raw_materials is tangible_thing.