query: embed.html#SELECT ?prop ?propLabel ?count ?sample ?sampleLabel ?sample_value WHERE {
      {
          SELECT ?prop (COUNT(DISTINCT ?item) AS ?count) (SAMPLE(?item) AS ?sample) (SAMPLE(?p) AS ?p) WHERE {
             
             hint:Query hint:optimizer "None" .
             ?item wdt:P3628 [] .
             ?item ?p ?id .
             ?prop wikibase:directClaim ?p .
  #           {?prop wdt:P31 wd:Q19847637}  # Wikidata property representing a unique identifier 
  #             UNION
  #           {?prop wdt:P31 wd:Q19595382}  # Wikidata property for authority control for people
             
            
          }  GROUP BY ?prop
      }
    
      ?sample ?p ?sample_value
             
      SERVICE wikibase:label {
          bd:serviceParam wikibase:language "en" .
      }
  
  } ORDER BY DESC (?count)