Assertion: ballpoint pen's ball | /r/CapableOf | roll on paper
Facets:
value: easily
type: MANNER
Source sentences:
text: In simple terms, this ball-and-socket mechanism allows the ball to roll around easily on paper while sealing the ink from the air so it doesn’t dry out.
text: This allows the ball to roll along paper when the pen’s in use.
text: The type of ballpoint ink that is usually found is a paste-like viscous ink that is sheared off by the rotating tungsten-carbide ball that is in the tip socket, laying down ink as the ball rolls across the paper.