What is <ZVG number> of <hafnium> ?
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What is the ZVG number of  hafnium?
SELECT DISTINCT ?i WHERE { resource:hafnium property:ZVG_number ?i }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1119> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P679> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q1119 wdt:P679 ?answer}
7720