What is {mouth of the watercourse} of {Neva} that is {of} is {Gulf of Finland} ?
Where is the mouth of the watercourse of Neva located on the Gulf of Finland?
where is mouth of the watercourse of Neva that is of is Gulf of Finland ?
SELECT ?w WHERE { resource:Neva property:mouth_of_the_watercourse ?o . ?o property:of resource:Gulf_of_Finland . ?o property:mouth_of_the_watercourse ?w }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q645> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P403> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P642> <http://wikidata.dbpedia.org/resource/Q14686>
} 

SELECT ?obj WHERE { wd:Q645 p:P403 ?s . ?s ps:P403 ?obj . ?s pq:P642 wd:Q14686 }