Assertion: volcano's magma | /r/CapableOf | reach the surface of the earth
Facets:
Source sentences:
text: The chief difference between a volcano and a mountain is that a volcano forms around a vent that allows magma to reach the surface of the Earth, while a mountain can be formed by a variety of different geological processes.
text: On the other hand, a volcano forms around a vent when magma flows out and reaches the surface of the earth.