Assertion: grassland's grass | /r/HasProperty | main plants
Facets:
Source sentences:
text: Grasses, such as barley, buffalo grass, pampas grass, purple needlegrass, foxtail, rye grass, wild oats, and wheat are the main plants that grow in these ecosystems.
text: There generally is a transitional zone, however, where oak, birch and aspen trees grow, although grasses are the main steppe plant.