Assertion: date palm's leaf | /r/HasAspect | tubular sheath
Facets:
value: at the base
type: LOCATION
Source sentences:
text: The leaves have a tubular sheath at the base that usually splits open on one side at maturity.
text: The leaves have a tubular sheath at the base that usually splits open on one side when it is grown.
text: The leaves have a tubular sheath at the base that usually splits open on one side when it is grown.