Assertion: adult trumpeter swan | /r/HasProperty | stained orange color
Facets:
value: sometimes
type: TEMPORAL
value: due to mud
type: CAUSE
value: due to iron-rich waters
type: CAUSE
Source sentences:
text: The adult Trumpeter Swan is entirely white, although the head and neck are sometimes stained an orange color due to iron-rich waters and mud where they forage for food.