Cumulonimbus Cloud
Table:
Cumulonimbus Cloud
Abbreviation	Cb
Genus	Cumulonimbus (heaped, rain)
Species

Calvus
Capillatus

Variety	None
Altitude	500-16,000 m
(2,000-52,000 ft)
Classification	Family C (Low-level)
Appearance	Very tall and large clouds
Precipitation cloud?	Very common, heavy at times

Using the given table, state whether the hypothesis is entailed, neutral, or refuted. Return the result as JSON: {"answer": "YOUR ANSWER"}.

Assertion: Cumulonimbus clouds are found in multiple varieties.

answer: refuted