Sibelius creates this:
    <lyric default-y="-159" number="part8verse1" color="#000000">
      <syllabic>single</syllabic>
      <text>something</text>
    </lyric>
	
MuseScore wants this:
    <lyric default-y="-159" number="1" color="#000000">
      <syllabic>single</syllabic>
      <text>something</text>
    </lyric>