what is the {symbolizes} for {flag of the United States of America} has {depicts} as {field} ?
Where is the National Gallery of Art headquartered at at the coordinates 38.89147 -77.02001?
What do the stars on the United States of America symbolize?
SELECT ?h WHERE { ?f property:symbolizes ?h . ?f property:depicts resource:field . resource:flag_of_the_United_States property:depicts ?f }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q42537> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P180> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q372254> .
?statement <http://www.wikidata.org/entity/P4878> ?value. 
} 

SELECT ?value WHERE { wd:Q42537 p:P180 ?s . ?s ps:P180 wd:Q372254 . ?s pq:P4878 ?value}