Question: Who is the {human} for {spouse} of {Katy Perry}
Paraphrase: Who is the { human } of { Katy Perry }'s { spouse }
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P26 wd:Q42493 . ?sbj wdt:P31 wd:Q5 } 
Answer: Russell Brand