Assertion: meerkat's eye | /r/HasAspect | adapted clear membrane
Facets:
value: firstly
type: MANNER
value: specially
type: MANNER
Source sentences:
text: Firstly their eyes have a specially adapted clear membrane that shields them from the sand while digging, and secondly, their ears are crescent-shaped and are able to close when digging so as to prevent the sand from getting in – and they can still hear alarm calls when their ears are closed!