Assertion: duck | /r/HasProperty | merganser
Facets:
Source sentences:
text: Ducks of the tribe Mergini include the bufflehead (Bucephala, or Glaucionetta, albeola), closely related to the goldeneye (B., or G., clangula); the mergansers; the oldsquaw (Clangula hyemalis); and scoters (Melanitta, or Oidemia, species).