query: # properties with most “statement disputed by” qualifiers on statements
  SELECT ?property ?propertyLabel (COUNT(?statement) AS ?count) WHERE {
    ?property a wikibase:Property;
              wikibase:claim ?p.
    ?entity ?p ?statement.
    ?statement pq:P1310 [].
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  GROUP BY ?property ?propertyLabel
  ORDER BY DESC(?count)