Assertion: natural prolongation | /r/HasProperty | established as concept
Facets:
value: in 1969
type: TEMPORAL
value: in the north sea continental cases
type: LOCATION
Source sentences:
text: The phrase natural prolongation was established as a concept in the North Sea Continental Cases in 1969.
text: The phrase natural prolongation was established as a concept in the North Sea Continental Cases in 1969.