How many {coolant} are to/by {liquid} ?
What is the number of cool liquids that exist?
How many cool liquids are there?
SELECT ( COUNT ( ?s ) AS ?a ) { ?s property:coolant resource:liquid }
SELECT (COUNT(?sub) AS ?subs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?sub .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P588> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q11435 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P588 wd:Q11435 }
62