What is <type of electrification> of <Amsterdam Metro> ?
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Which is the type of electrification for Amsterdam Metro?
SELECT DISTINCT ?b WHERE { resource:Amsterdam_Metro property:type_of_electrification ?b }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q260870> . ?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> ?answer. }
select distinct ?answer where { wd:Q260870 wdt:P930 ?answer}
third rail 750 V DC railway electrification