query: #title: First part should be a value of Wolfram Language entity type (P7497)
  # Complex constraint from [[Property talk:P4839]]
  # type is currently not a value of [[Property:P7497|Wolfram Language entity type&#32;<small dir="ltr">(P7497)</small>]]
  SELECT *
  {
    {  SELECT ?type (COUNT(*) as ?count) (SAMPLE(?value) as ?samplevalue) (SAMPLE(?item) as ?item) 
        {
  	     ?item wdt:P4839 ?value .
           BIND(strafter(strbefore(?value, "\","),"Entity[\"") as ?type)
        }
        GROUP BY ?type
    }
    MINUS { [] wdt:P7497 ?type }
  }
  ORDER BY DESC(?count)