sentences: a different sun caves occurs approximately once per strong
docs: cave is geological_formation. cave_bear is mammal. sun has iron caves_often has water_in_pools_or_streams mine is dark_manmade_cave. valley is natural_inanimate_thing. sunburst is sunlight. if quarry occurs then dig occurs. sun is approximately_93,000,000_miles_from_earth. cave is air_path_through_solid.