Assertion: porcupine's quill | /r/ObjectUse | used for defense
Facets:
Source sentences:
text: These sturdier quills are used, for the most part, for defense and are usually marked with light and dark bands which alternate; these are not firmly attached.
text: These sturdier quills are used, for the most part, for defense and are usually marked with light and dark bands which alternate; these are not firmly attached.