Assertion: acacia's thorn | /r/HasProperty | sharp
Facets:
Source sentences:
text: These thorns are long, sharp and painful to run into.
text: The thorns are sharp and white, with some straight and others hooked.
text: Its large "bull horn" shaped thorns are sharp and keep some animals away, but it has other methods of protection in case that doesn't work.
text: The genus Acacia is derived from the Greek akakia, referring to sharp thorns.