Assertion: adder's tail | /r/CapableOf | taper to white spine
Facets:
value: on the end of their tail
type: LOCATION
value: quickly
type: MANNER
Source sentences:
text: They're quite short and squat, they only grow to about 40cm with a very broad head and a tail that tapers quickly to a white spine on the end of their tail, which they use as a lure to attract prey.