Assertion: spider's silk | /r/HasProperty | useful
Facets:
value: very
type: DEGREE
value: for transportation
type: PURPOSE
Source sentences:
text: Silk can be useful for transportation, too.
text: Who knew silk could be so useful…or dangerous - if you’re a bug!
text: In addition, the silk that they produce is a wonder of nature and their ability to destroy harmful insects is very useful.