Assertion: graph's edge | /r/HasProperty | drawn as semicircle
Facets:
value: below the line
type: LOCATION
Source sentences:
text: Arc diagrams, a layout style dating back to the 1960s,  place vertices on a line; edges may be drawn as semicircles above or below the line, or as smooth curves linked together from multiple semicircles.
text: place vertices on a line; edges may be drawn as semicircles above or below the line, or as smooth curves linked together from multiple semicircles.