Assertion: eardrum | /r/CapableOf | form the boundary
Facets:
value: between the outer ear
type: LOCATION
Source sentences:
text: The thin semitransparent tympanic membrane , or eardrum, which forms the boundary between the outer ear and the middle ear, is stretched obliquely across the end of the external canal.
text: Eardrum also called tympanic membrane forms a boundary between the outer and middle ears.