Assertion: parakeet's eye | /r/HasProperty | lubricated by nictitating membrane
Facets:
Source sentences:
text: Instead the eye is lubricated by the nictitating membrane, a third eyelid that moves horizontally.
text: Instead the eye is lubricated by the nictitating membrane, a third concealed eyelid that sweeps horizontally across the eye like a windscreen wiper.