Assertion: volcano's flow | /r/HasAspect | two types
Facets:
value: by their structural characteristics
type: CAUSE
Source sentences:
text: Flows from Hawaiian eruptions can be divided into two types by their structural characteristics: pāhoehoe lava which is relatively smooth and flows with a ropey texture, and ʻaʻā flows which are denser, more viscous (and thus slower moving) and blockier.