Assertion: harp guitar | /r/HasProperty | the est-150
Facets:
Source sentences:
text: In early 1937 Gibson also began shipping two other versions of the ES-150: a tenor guitar (the EST-150, with four strings and a 23" scale, renamed the ETG-150 in 1940) and a plectrum version (the EPG-150, with a 27" scale).