Assertion: banjo | /r/AtLocation | boston
Facets:
value: commercially
type: MANNER
value: for a national market
type: PURPOSE
Source sentences:
text: Although the banjo had been commercially made in Chicago, New York, Boston and Philadelphia for a national market, and probably thousands of banjos had been made in previous years, it largely disappeared, except in regions such as Appalachia and the Ozarks.