Assertion: barnacle's shell | /r/AtLocation | the substrate
Facets:
value: permanently
type: MANNER
value: by a long stalk
type: MANNER
Source sentences:
text: Its shell resembles a goose head, and is attached to the substrate by a long stalk somewhat resembling a bird's neck.
text: Once they begin life on the rock, they cannot relocate as these shells are attached permanently to their substrate.