query-831a1fb93518183151811a63e92d26cd

rq turtle/ttl

Problem with QueryWhy does this query does not display the item labels and descriptions?

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX schema: <http://schema.org/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT
    ?item
    (Sample(?itemLabel) as ?itemLabel)
    (Sample(?itemDescription) as ?itemDescription) 
    (Sample(?st) as ?st)
    (Sample(?sl) as ?sl)
    (Sample(?ids) as ?ids)
    (Sample(?coor) as ?coor)
    (Sample(?image) as ?image)
WHERE {
    ?item wdt:P31 wd:Q5 . 
    ?item wdt:P106 wd:Q10873124 .
    ?item wikibase:statements ?st .
    ?item wikibase:sitelinks ?sl .
    OPTIONAL { ?item wikibase:identifiers ?ids . }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en".
                                 ?item rdfs:label ?itemLabel .
                                 ?item schema:description ?itemDescription . }
}
GROUP BY ?item 
ORDER BY ASC(?st) ?item
LIMIT 100

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v9("?coor"):::projected v9("?ids"):::projected v9("?image"):::projected v2("?item"):::projected v9("?itemDescription"):::projected v9("?itemLabel"):::projected v9("?sl"):::projected v9("?st"):::projected c11(["en"]):::literal c9(["bd:serviceParam"]):::iri c2(["wd:Q5"]):::iri c4(["wd:Q10873124"]):::iri v2 --"wdt:P31"--> c2 v2 --"wdt:P106"--> c4 v2 --"wikibase:statements"--> v9 v2 --"wikibase:sitelinks"--> v9 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v2 -."wikibase:identifiers".-> v9 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c9 --"wikibase:language"--> c11 v2 --"rdfs:label"--> v9 v2 --"schema:description"--> v9 end bind7[/"sample(?itemLabel)"/] v9 --o bind7 bind7 --as--o v9 bind8[/"sample(?itemDescription)"/] v9 --o bind8 bind8 --as--o v9 bind9[/"sample(?st)"/] v9 --o bind9 bind9 --as--o v9 bind10[/"sample(?sl)"/] v9 --o bind10 bind10 --as--o v9 bind11[/"sample(?ids)"/] v9 --o bind11 bind11 --as--o v9 bind12[/"sample(?coor)"/] v9 --o bind12 bind12 --as--o v9 bind13[/"sample(?image)"/] v9 --o bind13 bind13 --as--o v9