Assertion: african elephant's tusk | /r/HasProperty | valuable
Facets:
value: for the illegal ivory trade
type: PURPOSE
Source sentences:
text: African elephants are endangered largely owing to man’s greed for ivory which had to elephants being hunted and killed for their valuable tusks.
text: Their tusks are working tools to manipulate their environment, but are also a highly-valued human commodity for the illegal ivory trade.
text: Lastly, man should be mentioned, who has given chase to the African elephant since the olden days, for its meat as well as its valuable tusks.