Assertion: lichen | /r/CapableOf | live on rock
Facets:
Source sentences:
text: They can live on rocks and, as they grow, the acids they secrete break down the rocks.
text: Lichen structures growing on forest trees and the lichens surviving on rocks can be very old, some times even million years old.
text: Lichen is known a part of biological soil crust for it is found living on the soil surface, gravestones, walls and rocks.