Assertion: spark plug's center electrode | /r/CapableOf | form with grounded terminal
Facets:
value: on the base of the plug
type: LOCATION
Source sentences:
text: Spark plugs have an insulated center electrode which is connected by a heavily insulated wire to an ignition coil or magneto circuit on the outside, forming, with a grounded terminal on the base of the plug, a spark gap inside the cylinder.