a light spreading bag light matter into mechanical matter
coolant is fluid. light_mortar_launcher is portable_object. white_matter is solid_animal_matter. grey_matter is solid_animal_matter. compact_flourescent_lamp is flourescent_lightbulb. spreading_stuff_onto_surface is spreading. white_matter is nervous_tissue. light_machine_gun is portable_machine_gun. flourescent_lightbulb is gas_discharge_lamp.