Assertion: hip hop | /r/CapableOf | revolve around a strong 4/4 beat
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Source sentences:
text: Because rap revolves around a strong 4/4 beat, with certain syllables said in time to the beat, all the notational systems have a similar structure: they all have the same 4 beat numbers at the top of the diagram, so that syllables can be written in-line with the beat numbers.