Assertion: butterfly's eye | /r/HasProperty | set in the face
Facets:
value: on the end of weird stalks
type: LOCATION
Source sentences:
text: In most arthropods, these compound eyes are paired, either set in the face or on the end of weird stalks; in spiders, though, the eyes are arranged in all sorts of bizarre ways, as witness the two main eyes and eight "supplementary" eyes of the wolf spider.