Assertion: lamprey's eye | /r/HasProperty | a part of the epithalamus
Facets:
Source sentences:
text: The parietal eye is a part of the epithalamus, which can be divided into two major parts; the epiphysis (the pineal organ, or pineal gland if mostly endocrine) and the parapineal organ (often called the parietal eye, or third eye if it is photoreceptive).