"N/A" a pato:0001241 ;
dc:identifier "N/A" ;
dc:title "Acute phase proteins" ;
dc:source "N/A".
$ curl -L https://github.com/marvinm2/AOPWikiRDF/raw/master/data/AOPWikiRDF.ttl | rapper -i turtle -o ntriples - http://aopwiki.org/ | gzip > AOPWikiRDF.n3.gz
rapper: Error - URI http://aopwiki.org/:165632 - syntax error, unexpected string literal
rapper: Failed to parse file <stdin> turtle content
rapper: Parsing returned 71090 triples
6500 a cheminf:000405 ;
cheminf:000405 "";
dc:identifier "6500";
dc:source "ChemSpider".
213108 a cheminf:000405 ;
cheminf:000405 "";
dc:identifier "213108";
dc:source "ChemSpider".
I think the literal on the left should be an IRI.