query: embed.html## All popes with number of children
  SELECT  ?father ?fatherLabel  (SAMPLE(?picture) as ?picture) (COUNT(?child) as ?children) WHERE {
    ?child wdt:P22 ?father.
    ?father wdt:P31 wd:Q5;
            wdt:P39 wd:Q19546.
    OPTIONAL { ?father wdt:P18 ?picture. }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
  }
  GROUP BY ?father ?fatherLabel
  ORDER BY DESC(?children)