Assertion: manuscript's book | /r/HasProperty | rare
Facets:
value: extremely
type: DEGREE
Source sentences:
text: There were no formal rules about copyright and authorship, and indeed books were extremely rare, so nobody complained.
text: This complimentary e-digest, launched in 2012, covers significant acquisitions and sales, manuscripts lost and found, rare books and ephemera, document conservation, and more.