query-f51311ac8a4a91343167f4c026ccb200

rq turtle/ttl

Architectural structure on my list also. (Q48690925)Centrální kotelna . So I want (P279)subclass of as (Q811979)architectural structure has (Q41176)building and (P279)subclass of as (Q41176)building has (Q1739809)boiler house and (Q1739809)boiler house = (P31)instance of , where (Q48690925)Centrální kotelna . Unfortunately, my query cannot proceed before timeout. Why? Is my query correct? E.g. I have (Q2444636)Prague 2 in s(Q811979)architectural structure I am trying to list

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?archstruct ?archstructLabel ?something ?something2 WHERE {

 ?archstruct  wdt:P131 wd:Q2444636.  #architectural structure located in Prague 2
{ ?archstruct  wdt:P31 ?something. #architectural structure is something
 ?somehting wdt:P31 wd:Q811979.} #and "something" is architectural structure, or...
       UNION 
      {
    ?something wdt:P31 ?something2.  #...something2
    ?something2 wdt:P31 wd:Q811979. #something2 is srchitectural structure  
      } 
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],cs". }
}
LIMIT 100

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v1("?archstruct"):::projected v3("?somehting") v2("?something"):::projected v4("?something2"):::projected c8(["#91;AUTO_LANGUAGE#93;,cs"]):::literal c2(["wd:Q2444636"]):::iri c6(["bd:serviceParam"]):::iri c4(["wd:Q811979"]):::iri v1 --"wdt:P131"--> c2 subgraph union0[" Union "] subgraph union0l[" "] style union0l fill:#abf,stroke-dasharray: 3 3; v2 --"wdt:P31"--> v4 v4 --"wdt:P31"--> c4 end subgraph union0r[" "] style union0r fill:#abf,stroke-dasharray: 3 3; v1 --"wdt:P31"--> v2 v3 --"wdt:P31"--> c4 end union0r <== or ==> union0l end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c6 --"wikibase:language"--> c8 end