Assertion: obsidian | /r/CapableOf | serve as substitute
Facets:
value: for stingray spines
type: PURPOSE
Source sentences:
text: Obsidian was frequently used in ritualized autosacrifice (blood-letting) activities, serving as a substitute for stingray spines.
text: Obsidian was frequently used in ritualized autosacrifice (blood-letting) activities, serving as a substitute for stingray spines.