Assertion: mariana mallard | /r/HasProperty | derived
Facets:
value: originally
type: OTHER
value: probably
type: DEGREE
Source sentences:
text: The now extinct Mariana mallard was probably originally derived from hybrids between this species and the mallard, which came to the islands during migration and settled down there.
text: The Mariana Mallard was derived from Mallard × Pacific Black Duck hybrids, but became extinct in the 1980s.