Assertion: vibraphone | /r/AtLocation | the united states
Facets:
Source sentences:
text: Vibraphones were first made in the United States in 1921.
text: Vibraphones were first made in the United States in 1921.
text: Vibraphones were first made in the United States in 1921.
text: Vibraphones were first made in the United States in 1921.