Assertion: piton | /r/HasProperty | useful tools
Facets:
value: for climbers
type: TRANSITIVE-OBJECT
value: in places
type: LOCATION
value: for aid climbing
type: PURPOSE
Source sentences:
text: That said, pitons are still useful tools for climbers in places where a nut or cam can’t work, in the dirt- or gravel-filled cracks for example, and for aid climbing when clean aid trickery won’t work.