Assertion: cerebrum's layer | /r/HasProperty | weblike arachnoid mater
Facets:
Source sentences:
text: The middle layer is the weblike arachnoid mater; its threadlike extensions span the subarachnoid space to attach it to the innermost membrane.
text: The middle layer is the weblike arachnoid mater; its threadlike extensions span the to attach it to the innermost membrane.