+
+<p>Oppdatering 2015-12-26: Jonas Smedegaard send me an updated search
+expression as the original one no longer work with <a
+href="http://dbpedia.org/sparql">dbpedia.org</a>. The
+<a href="http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=PREFIX+foaf%3A+%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0D%0APREFIX+skos%3A+%3Chttp%3A%2F%2Fwww.w3.org%2F2004%2F02%2Fskos%2Fcore%23%3E%0D%0APREFIX+dct%3A++%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3E%0D%0APREFIX+dbpprop%3A+%3Chttp%3A%2F%2Fdbpedia.org%2Fproperty%2F%3E%0D%0APREFIX+xsd%3A+%3Chttp%3A%2F%2Fwww.w3.org%2F2001%2FXMLSchema%23%3E%0D%0A%0D%0ASELECT+%3Fname+%3Fpage+%3FYEAR+WHERE+%7B%0D%0A++%3Fperson+a+foaf%3APerson+%3B%0D%0A++++++++++foaf%3AisPrimaryTopicOf+%3Fpage+%3B%0D%0A++++++++++dbpprop%3Aname+%3Fname+%3B%0D%0A++++++++++dbo%3AdeathYear+%3FYEAR+%3B%0D%0A++++++++++dct%3Asubject%2Fskos%3Abroader%3F++%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FCategory%3ANorwegian_artists%3E%0D%0A++FILTER+%28%3FYEAR+%3C+xsd%3Adate%28%221945-01-01%22%29%29%0D%0A%7D&format=text%2Fhtml&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on">updated
+search</a> look like this:</p>
+
+<pre>
+PREFIX foaf: &lt;http://xmlns.com/foaf/0.1/&gt;
+PREFIX skos: &lt;http://www.w3.org/2004/02/skos/core#&gt;
+PREFIX dct: &lt;http://purl.org/dc/terms/&gt;
+PREFIX dbpprop: &lt;http://dbpedia.org/property/&gt;
+PREFIX xsd: &lt;http://www.w3.org/2001/XMLSchema#&gt;
+
+SELECT ?name ?page ?YEAR WHERE {
+ ?person a foaf:Person ;
+ foaf:isPrimaryTopicOf ?page ;
+ dbpprop:name ?name ;
+ dbo:deathYear ?YEAR ;
+ dct:subject/skos:broader? &lt;http://dbpedia.org/resource/Category:Norwegian_artists&gt;
+ FILTER (?YEAR &lt; xsd:date("1945-01-01"))
+}
+</pre>
+
+<p>He also provided
+<a href="http://data.deichman.no/sparql?default-graph-uri=&query=PREFIX+dct%3A+%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3E%0D%0APREFIX+foaf%3A+%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0D%0ASELECT+%3Fressource+WHERE+%7B%0D%0A++%3Fressource+dct%3Acreator+%3Fcreator+.%0D%0A++%3Fcreator+foaf%3Aname+%22Lawrence+Lessig%22+.%0D%0A%7D&format=text%2Fhtml&timeout=0&debug=on">a
+search on the SPARQL interface of data.deichman.no</a> to look up a
+single author there:</p>
+
+<pre>
+PREFIX dct: <http://purl.org/dc/terms/>
+PREFIX foaf: <http://xmlns.com/foaf/0.1/>
+SELECT ?ressource WHERE {
+ ?ressource dct:creator ?creator .
+ ?creator foaf:name "Lawrence Lessig" .
+}
+</pre>
+
+<p>I hope this can provide me with enough starting points to be able
+to map books to long dead authors.</p>