WorldKG

class	count
http://www.worldkg.org/schema/Dam	46758
http://www.worldkg.org/schema/Waterfall	29829
http://www.worldkg.org/schema/Weir	14351
http://www.worldkg.org/schema/LockGate	7514
http://www.worldkg.org/schema/Stream	7293
http://www.worldkg.org/schema/WaterwayCanal	6467
http://www.worldkg.org/schema/Soakhole	4259
http://www.worldkg.org/schema/WaterwayRiver	1995
http://www.worldkg.org/schema/Dock	1235
http://www.worldkg.org/schema/WaterwayFuel	1063
http://www.worldkg.org/schema/Boatyard	993
http://www.worldkg.org/schema/WaterwayWaterPoint	282
http://www.worldkg.org/schema/Drain	271
http://www.worldkg.org/schema/TurningPoint	157
http://www.worldkg.org/schema/WaterwayDitch	34
http://www.worldkg.org/schema/TidalChannel	1
http://www.worldkg.org/schema/Fairway	1

Query

SELECT ?class (COUNT(?resource) AS ?count) WHERE {
  ?class rdfs:subClassOf wkgs:Waterway .
  ?resource rdf:type ?class.
  } GROUP BY ?class
ORDER BY DESC(?count)