What is {sibling} of {Mary, Queen of Scots} that is {type of kinship} is {paternal half-sister} ?
Who was the paternal half-sister of Mary, Queen of Scots?
SELECT ?obj WHERE { wd:Q131412 p:P3373 ?s . ?s ps:P3373 ?obj . ?s pq:P1039 wd:Q19595228 }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q131412> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3373> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P1039> <http://wikidata.dbpedia.org/resource/Q19595228>
} 

Mary, Queen of Scot's half - sister name?