Assertion: blackberry's stem | /r/HasProperty | biennial
Facets:
Source sentences:
text: Blackberries are perennial plants which typically bear biennial stems from the perennial root system.
text: Blackberries are perennial plants which typically bear biennial stems ("canes") from the perennial root system.
text: Blackberries are perennial plants which typically bear biennial stems ("canes") from the perennial root system.