Assertion: werewolf's change | /r/HasProperty | voluntary
Facets:
value: at will
type: MANNER
Source sentences:
text: The change from man to wolf is held to be possible by witchcraft or magic, and can be voluntary or forced by certain cycles of the moon and certain sounds (such as howling).
text: The change can be voluntary (at will), or can be forced by certain cycles of the moon and certain sounds (such as howling).