How many {electrical plug type} are for {Laos} ?
Laos has how many types of electrical plugs?
How many electrical plug types are for Laos?
SELECT ( COUNT ( ?m ) AS ?o ) { resource:Laos property:electrical_plug_type ?m }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q819> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2853> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q819 wdt:P2853 ?obj }
5