How many {type of electrification} are for {Guangzhou Metro} ?
Which was the way that Guangzhou Metro got electrified?
How was Guangzhou Metro electrified?
SELECT ( COUNT ( ?q ) AS ?s ) { resource:Guangzhou_Metro property:type_of_electrification ?q }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q660751> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P930> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q660751 wdt:P930 ?obj }
4