Assertion: speed skate's blade | /r/HasProperty | hollow ground
Facets:
value: in cross section
type: LOCATION
value: on the bottom
type: LOCATION
Source sentences:
text: The blade is also "hollow ground"; a groove on the bottom of the blade creates two distinct edges, inside and outside.
text: The blade is hollow on the bottom so that only the outer edges touch the ice.
text: Similar to figure skates, the blade is hollow ground in cross section, creating two edges that contact and cut into the ice, allowing increased maneuverability.