How many {competition class} are to/by {100 metres} ?
How many {competition class} are to/by {100 metres} ?
SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P2094 wd:Q164761 }
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/P2094> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q164761 .
} 

Which is the number of competition classes for the 100 metres?