Assertion: double bass's string | /r/MadeOf | steel
Facets:
value: usually
type: DEGREE
Source sentences:
text: Today the string bass has four (or five strings) made of steel and there are two basic tunings for it: classical and solo.
text: In the early years of the 20th century, strings were made of either gut or steel.
text: Strings are usually made of steel now.