Assertion: banjo's membrane | /r/HasProperty | stretched over the cavity
Facets:
Source sentences:
text: The banjos made after the 1950s usually have a plastic membrane stretched over the cavity.
text: Banjos are musical instruments that consist of a membrane stretched over a cavity that functions as a resonator and a head where the strings are attached.
text: The banjos made after the 1950s usually have a plastic membrane stretched over the cavity.