Assertion: percussion instrument's body | /r/HasAspect | only one usable membrane
Facets:
Source sentences:
text: 211.222.1 Single instruments 211.222.2 Sets of instruments 211.223 Mixed sets of barrel drums 211.23 Instruments in which the body is hourglass-shaped 211.231 Instruments which have only one usable membrane 211.231.1 Instruments in which the end without a membrane is open