Assertion: echidna | /r/CapableOf | form a ball of spines
Facets:
Source sentences:
text: Spiny anteaters are not aggressive, and when threatened, they may roll up to form a ball of spines, or burrow themselves in ground.
text: Spiny anteaters are not aggressive, and when threatened, they may roll up to form a ball of spines, or burrow themselves in ground.