Assertion: blackberry's stem | /r/CapableOf | grow 20 to 40 feet long
Facets:
value: root at the tips
type: OTHER
Source sentences:
text: Stems (canes) can grow 20 to 40 feet long and 13 feet tall, root at the tips when they touch the ground, and have stout, hooked, sharp prickles with wide bases.