User:TweetsFactsAndQueries/Queries/some signature images

Originally posted on Twitter and on Mastodon.

#defaultView:ImageGrid{"hide":["?placeOfBirthCoordinates", "?signature"]}
#view:Map{"hide":["?placeOfBirthCoordinates"]}
SELECT ?person ?personLabel ?signature ?placeOfBirthCoordinates WITH {
  # get all the actual data
  SELECT ?person (SAMPLE(?signature_) AS ?signature) (SAMPLE(?placeOfBirthCoordinates_) AS ?placeOfBirthCoordinates) WHERE {
    # get some random signature image statements
    SERVICE bd:sample {
      ?person wdt:P109 ?signature_.
      bd:serviceParam bd:sample.limit 110 . # a bit over 100 in case some of them happen to be non-humans
    }
    # ensure they’re signatures of humans (most are but there are some exceptions)
    ?person wdt:P31 wd:Q5.
    # for the map display, optionally add the place of birth
    OPTIONAL {
      ?person wdt:P19 ?placeOfBirth.
      ?placeOfBirth wdt:P625 ?placeOfBirthCoordinates_.
    }
  }
  GROUP BY ?person # avoid multiple results in case of multiple signature / place of death (coordinate) statements
  LIMIT 100
} AS %results WHERE {
  # add labels
  INCLUDE %results.
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

Try it!