Assertion: axolotl's gill | /r/HasProperty | hidden
Facets:
value: within the egg
type: LOCATION
value: beneath slits
type: LOCATION
Source sentences:
text: Some species respire through gills that are on each side of their heads, most of them have external gills and some have internal gills which are hidden beneath slits.
text: The tail and gills of the larvae are visible within the egg.