Assertion: piano's part | /r/CapableOf | become packed
Facets:
value: firmly
type: MANNER
value: from repeated contact with the strings
type: CAUSE
Source sentences:
text: The bass strings are so large they still are struck;) and the part of the hammer's surface that has become firmly packed from repeated contact with the strings is moved over so a softer, less-used part of the surface strikes the strings.