a light spreading bag light matter into mechanical matter
white_matter is not solid_animal_matter. coolant is fluid. light_machine_gun is portable_machine_gun. white_matter is nervous_tissue. white_matter is solid_animal_matter. light_machine_gun is not portable_machine_gun. white_matter is not nervous_tissue. flourescent_lightbulb is not gas_discharge_lamp. flourescent_lightbulb is gas_discharge_lamp. grey_matter is solid_animal_matter.