What is {child} of {Pompey} that is {mother} is {Mucia Tertia} ?
What kid did Pompey and Mucia Tertia have?
Who is the child of Pompey and the mother, Mucia Tertia?
SELECT ?t WHERE { ?p property:child ?t . resource:Pompey property:child ?p . ?p property:mother resource:Mucia_Tertia }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q125414> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P40> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P25> <http://wikidata.dbpedia.org/resource/Q273616>
} 

SELECT ?obj WHERE { wd:Q125414 p:P40 ?s . ?s ps:P40 ?obj . ?s pq:P25 wd:Q273616 }