a prairie is a kind of ecosystem
grassland_prairie_ecosystem is not biome. prairie_gentian is wildflower. grassland_prairie_ecosystem is not tangible_thing. grassland_prairie_ecosystem is biome. prairie is not grassland. grassland_prairie_ecosystem is natural_thing. prairie is grassland. grassland_prairie_ecosystem is tangible_thing. forest is ecosystem. grassland_prairie_ecosystem is not natural_thing.