query: SELECT ?person ?personLabel ?relative ?relativeLabel
  { 
    ?person wdt:P22/wdt:P25 ?relative.
    ?person wdt:P31 wd:Q5 . ?relative wdt:P31 wd:Q5 .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  LIMIT 10