query-29b7ae56618ee4ce8ecfabe41012ca40

rq turtle/ttl

title: Invasion biology papers without "main subject" (P921) statements SELECT DISTINCT ?work ?title WHERE { ?work wdt:P6104 wd:Q56241615 ; wdt:P1476 ?title . FILTER NOT EXISTS {?work wdt:P921 [] .} }

Use at

https://query.wikidata.org/sparql

PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
#title: Invasion biology papers without "main subject" (P921) statements
SELECT DISTINCT ?work ?title
WHERE {
  ?work wdt:P6104 wd:Q56241615 ;
        wdt:P1476 ?title .
  FILTER NOT EXISTS {?work wdt:P921 [] .}
}

Query found at

https://www.wikidata.org/wiki/Wikidata:WikiProject_Invasion_biology

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v2("?title"):::projected v1("?work"):::projected a1((" ")) c3(["wd:Q56241615"]):::iri f0[["not "]] subgraph f0e0["Exists Clause"] e0v1 --"wdt:P921"--> e0a1 e0v1("?work"):::projected e0a1((" ")):::projected end f0--EXISTS--> f0e0 f0 --> v1 f0 --> c1 f0 --> a1 v1 --"wdt:P921"--> a1 v1 --"wdt:P6104"--> c3 v1 --"wdt:P1476"--> v2