Assertion: stringed instrument's string | /r/HasProperty | struck with hammer
Facets:
value: to produce sound
type: PURPOSE
Source sentences:
text: It is considered percussion because the strings are struck with hammers to produce sound.
text: Because the piano has strings, it is considered a string instrument, but the instrument is also considered a percussion instrument because the strings are struck by hammers.
text: The dulcimer is a psaltery having strings that are struck with hammers rather than plucked.