Assertion: duck's eye | /r/AtLocation | groove
Facets:
Source sentences:
text: The nostrils are located on the dorsal surface of the snout, while the eyes and ears are located in a groove set just back from it; this groove is closed when swimming.
text: Their nostrils are located on the dorsal surface of the snout while the eyes and ears are located in a groove set just back from it.