Assertion: porcupine's spine | /r/HasProperty | ineffective
Facets:
value: at warding off attackers
type: TRANSITIVE-OBJECT
value: comparatively
type: MANNER
Source sentences:
text: However, the spines from the remaining rodent families (e.g., Muridae and Echimyidae) are comparatively ineffective at warding off attackers, so their function is not fully understood.