query: #multi-value constraint report for Was a bee/ConstraintTemplate
  SELECT ?item ?itemLabel ?sample ?sampleLabel
  {
  	{
  		SELECT ?item (COUNT(?value) AS ?count) (SAMPLE(?value) AS ?sample) {
  			?item wdt:Was a bee/ConstraintTemplate ?value .
  		}
  		GROUP BY ?item
  		HAVING (?count=1)
  	}
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "en,en" } .
  } LIMIT 1000