| http://www.w3.org/ns/prov#value | - Moreover, the presentation for this list of candidates for musical pieces to be purchased is not a result of searching for a musical piece by specifying a genre or an artist name by the user X, but is a result of referring to the playlists of another user Y. As a result, this becomes an assistance for the user X to find and purchase a musical piece of an artist that the user X does not know and a
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