Assertion: cumulonimbus cloud's top | /r/CapableOf | extend into the middle cloud level
Facets:
value: upwards
type: MANNER
Source sentences:
text: Though it’s difficult to tell visually, these clouds can be put into the category of multilevel clouds, meaning the base of a nimbostratus cloud can be found relatively close to the ground, but the tops of them can extend upwards into the middle cloud level.