Song, poem, or verse.
The following, in order:
<label> Label of a Figure, Reference, Etc., zero or one
<title> Title, zero or one
<subtitle> Article Subtitle, zero or one
One or more of any of:
<verse-line> Line of a Verse
<verse-group> Verse Form For Poetry
Any combination of:
Ownership Elements
<attrib> Attribution
<permissions> Permissions