{
  "rule": "When the song has words, every section of the score carries the words sung there (lyrics.lines, one line per phrase), and a section the song repeats (a chorus) carries them in full; a section with no words has none ([]). role is the section's part in the song form. The words are not timing and not what plays: timingHash, arrangementHash and scoreHash ignore them; lyricsHash covers them.",
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