Assertion: chisel's shape | /r/CapableOf | hold the disc
Facets:
value: into the soil
type: TRANSITIVE-OBJECT
Source sentences:
text: A simpler, later system uses a concave disc (or pair of them) set at a wide angle to the direction of progress, using a concave shape to hold the disc into the soil – unless something hard strikes the circumference of the disc, causing it to roll up and over the obstruction.