a simple is made of one or more raindrops chemically combined
raindrop is rainwater. raindrop is droplet_of_water. raindrop is not rainwater. teardrop is natural_inanimate_thing. raindrop is not fresh_water_particle. dewdrop is particle. raindrop is fresh_water_particle. dihydropyridine is chemical_compound. simple_chemical_decomposition is chemical_decomposition. dewdrop is not particle.