melted marshmallow is a kind of substance
marshmallow is not spongy_thing. marshmallow is unnatural_thing. marshmallow is candy. marshmallow is food_ingredient. marshmallow is not sweet_thing. marshmallow is not unnatural_thing. marshmallow is spongy_thing. marshmallow is homogeneous_structure. melted_solid is liquid. marshmallow is sweet_thing.