Assertion: parabola's point | /r/CapableOf | collapse to single point
Facets:
value: in the degenerate case
type: LOCATION
Source sentences:
text: The points and (which can collapse to a single point in the degenerate case) are then the points of tangency of the lines and and the parabola (Wells 1991).
text: The points T A and T B (which can collapse to a single point in the degenerate case) are then the points of tangency of the lines PA and PB and the parabola (Wells 1991).