Assertion: snake's gland | /r/HasProperty | situated on each side of the head
Facets:
value: behind the eye
type: LOCATION
value: usually
type: TEMPORAL
Source sentences:
text: The glands that secrete the zootoxins are a modification of the parotid salivary glands found in other vertebrates, and are usually situated on each side of the head, below and behind the eye, and encapsulated in a muscular sheath.