query-2585690e74f19f9e19c761e2d64f3350
number of publications from before 1800 without copyright statementI am looking for number of publications from before 1800 without copyright statement, however below query seems to time out. Any idea what is wrong with it?
Use at
- https://query.wikidata.org/sparql
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT (count(?item) as ?num) where {
?item wdt:P577 ?dop .
FILTER(?dop < "1800"^^xsd:dateTime).
MINUS { ?item wdt:P6216 [] } .
}
Query found at
graph TD
classDef projected fill:lightgreen;
classDef literal fill:orange;
classDef iri fill:yellow;
v1("?dop")
v2("?item"):::projected
v3("?num")
a1((" "))
f0[["?dop < '1800^^xsd:dateTime'"]]
f0 --> v1
v2 --"wdt:P577"--> v1
subgraph minus1["MINUS"]
style minus1 stroke-width:6px,fill:pink,stroke:red;
v2 --"wdt:P6216"--> a1
end
bind3[/"count(?item)"/]
v2 --o bind3
bind3 --as--o v3