What is <type of kinship> of <son-in-law> ?
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What type kinship is a son-in-law?
SELECT DISTINCT ?l WHERE { ?l property:kinship_to_subject resource:son-in-law }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject>  ?answer. ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1039> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q3752578>. }
select distinct ?answer where { ?answer wdt:P1039 wd:Q3752578}
Henri Daniaud