<urn:biopax:RelationshipXref:NCBI+GENE_4000> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.biopax.org/release/biopax-level3.owl#RelationshipXref> .
<urn:biopax:RelationshipXref:NCBI+GENE_4000> <http://www.biopax.org/release/biopax-level3.owl#db> "NCBI Gene"^^<http://www.w3.org/2001/XMLSchema#string> .
<urn:biopax:RelationshipXref:NCBI+GENE_4000> <http://www.biopax.org/release/biopax-level3.owl#id> "4000"^^<http://www.w3.org/2001/XMLSchema#string> .