| http://www.w3.org/ns/prov#value | - ion, of an unpublished literary, dramatic or musical work kept in a library, museum or other institution to which the public has access: Provided that where the identity of the author of any such work or, in the case of a work of joint authorship, of any of the authors is known to the library, museum or other institution, as the case may be, the provisions of this clause shall apply only if such r
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