What concepts are described in the following sentence?

"A Fortress of Grey Ice which was written by J.V. Jones, was made in "Print" and has the OCLC number 51969173."

Return the answer as pairs of triples.
A Fortress of Grey Ice OCLC_NUMBER 51969173
A Fortress of Grey Ice AUTHOR J. V. Jones
A Fortress of Grey Ice MEDIA_TYPE "Print"