User:TweetsFactsAndQueries/Queries/same-sex married couples where neither partner has a sexual orientation

Originally posted on Twitter and on Mastodon.

SELECT DISTINCT ?person1 ?person2 ?person1Label ?person1Description ?person2Label ?person2Description WHERE {
  ?person1 wdt:P31 wd:Q5;
           wdt:P21 ?gender;
           wdt:P569 ?dob1;
           wdt:P26 ?person2.
  ?person2 wdt:P31 wd:Q5;
           wdt:P569 ?dob2;
           wdt:P21 ?gender.
  MINUS { ?person1 wdt:P91 ?orientation. }
  MINUS { ?person2 wdt:P91 ?orientation. }
  # arbitrarily filter out some early results, we’re more likely to find references for recent people
  FILTER(?dob1 >= "1950-01-01"^^xsd:dateTime)
  FILTER(?dob2 >= "1950-01-01"^^xsd:dateTime)
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

Try it!