Select all cross-references to external databases of the Uniprot category classified with keyword.

Statement: 

Select all cross-references to external databases of the category $term$ (e.g. 3D structure databases) of UniProt entries that are classified with the keyword '3Fe-4S' $keyword$ (e.g., 3) A limit of results per page $number$ (e.g. 10)

Query: 
PREFIX up:<http://purl.uniprot.org/core/> PREFIX keywords:<http://purl.uniprot.org/keywords/> PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#> SELECT DISTINCT ?link WHERE { ?protein a up:Protein . ?protein up:classifiedWith keywords:??keyword . ?protein rdfs:seeAlso ?link . ?link up:database ?db . ?db up:category '??term' } limit ??number
Tags: