Assertion: bookmark | /r/MadeOf | card
Facets:
value: commonly
type: DEGREE
Source sentences:
text: Bookmarks are made of a card, leather, or a piece of fabric that people use to keep their places in books.
text: A bookmark is a thin marker, commonly made of card, leather, or fabric, used to keep a reader's place in a book and to enable them to easily return to it.