Assertion: puncture | /r/CreatedBy | thorn
Facets:
Source sentences:
text: Kevlar-belted tires have a layer of Kevlar under the tread surface, with the purpose of making the tire more resistant to punctures caused by small sharp objects, such as thorns and glass slivers.
text: Some punctures are caused by glass slivers or thorns gradually working their way through the tire tread.