Assertion: stringed instrument's string | /r/HasProperty | tightened
Facets:
Source sentences:
text: The construction and maintenance of Western stringed instruments generally have been complicated over the centuries by a continual rise in standard pitch, requiring strings to be tightened.
text: The remaining strings, which were tightened and loosened with metal harp wrest-pins and a tuning key or wrench, were usually bowed with a horsehair and wood bow.