PREFIX rdf: PREFIX rdfs: PREFIX schema: PREFIX geo: PREFIX skos: PREFIX xsd: PREFIX vocab: PREFIX time: PREFIX owl: PREFIX org: PREFIX rdfs: select distinct * { { select ?id ?name ?description ?organization ?place ?profession ?year { ?id rdf:type vocab:LabourConflict ; schema:name ?name ; schema:startDate ?startDate ; schema:description ?description ; vocab:profession ?profession ; schema:organization/schema:name ?organization ; schema:location/schema:name ?place. BIND(REPLACE(STR(?startDate), "(\\d{4})(-\\d{2}-\\d{2})", "$1") AS ?year) FILTER regex(?name, ?keyword ,'i') } } union { select ?id ?name ?description ?organization ?place ?profession ?year { ?id rdf:type vocab:LabourConflict ; schema:name ?name ; schema:startDate ?startDate ; vocab:profession ?profession ; schema:description ?description ; schema:organization/schema:name ?organization ; schema:location/schema:name ?place . BIND(REPLACE(STR(?startDate), "(\\d{4})(-\\d{2}-\\d{2})", "$1") AS ?year) FILTER regex(?description, ?keyword ,'i') } } union { select ?id ?name ?description ?organization ?place ?profession ?year { ?id rdf:type vocab:LabourConflict ; schema:name ?name; schema:startDate ?startDate ; schema:description ?description ; vocab:profession ?profession ; schema:organization/schema:name ?organization ; schema:location/schema:name ?place . BIND(REPLACE(STR(?startDate), "(\\d{4})(-\\d{2}-\\d{2})", "$1") AS ?year) FILTER regex(?organization, ?keyword ,'i') } } union { select ?id ?name ?description ?organization ?place ?profession ?year { ?id rdf:type vocab:LabourConflict ; schema:name ?name; schema:startDate ?startDate ; vocab:profession ?profession ; schema:description ?description ; schema:organization/schema:name ?organization ; schema:location/schema:name ?place . BIND(REPLACE(STR(?startDate), "(\\d{4})(-\\d{2}-\\d{2})", "$1") AS ?year) FILTER regex(?place, ?keyword ,'i') } } FILTER(LANG(?name) = "" || LANGMATCHES(LANG(?name), "nl")) }