Assertion: marimba's bar | /r/HasProperty | struck
Facets:
Source sentences:
text: According to oral history, the story of the marimba began a long, long time ago in Africa, where holes were dug in the ground, wooden bars were made to cross over this hole, and the bars were struck to produce sound.
text: Suspended vertically below each aluminum bar is a tubular, tuned resonator that sustains the tone when the bar is struck.
text: CLICK HERE to learn why the marimba bars produce different sounds depending on where the bar is struck