Assertion: concertina's key | /r/CapableOf | enable to play same notes
Facets:
value: by cross
type: MANNER
value: on pull
type: LOCATION
value: on push
type: TEMPORAL
Source sentences:
text: The International System has the rows in, for example, G, C, and F, from lowest to highest key, which enables, by cross fingering to play the same notes on push and pull.