construction dioxide are a mile / child dissociate used for dark lighten
primary_colour_for_light is not primary_colour. primary_subtractive_colour_for_light is primary_colour_for_light. darkenness is dark_or_dimly. sulfur_dioxide is dioxide. primary_colour_for_light is primary_colour. half_light is not light. carbon_dioxide is colourless_and_odourless. carbon_dioxide is dioxide. half_light is light. nitrogen_dioxide is dioxide.