SPARQL query to get citations and related subjects for Syriaca.org data

realtions-citations.rq

prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix lawd: <http://lawd.info/ontology/>
prefix skos: <http://www.w3.org/2004/02/skos/core#>
prefix dcterms: <http://purl.org/dc/terms/>  
                            	        
SELECT ?uri (SAMPLE(?l) AS ?label) (SAMPLE(?uriSubject) AS ?subjects) (SAMPLE(?uriCitations) AS ?citations)
	{
		?uri rdfs:label ?l
		FILTER (?uri IN ( <http://syriaca.org/person/782>,<http://syriaca.org/person/552>,<http://syriaca.org/person/684>,<http://syriaca.org/person/492>)).
		FILTER ( langMatches(lang(?l), 'en')).
                OPTIONAL{
                          {SELECT ?uri ( count(?s) as ?uriSubject ) { ?s dcterms:relation ?uri } GROUP BY ?uri }  }
                OPTIONAL{
                          {SELECT ?uri ( count(?o) as ?uriCitations ) { ?uri lawd:hasCitation ?o 
                                  OPTIONAL{ ?uri skos:closeMatch ?o.}
			} GROUP BY ?uri }
		}           
        }
GROUP BY ?uri