What is <IPNI plant ID> of <Hordeum vulgare> ?
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What is Hordeum vulagare's  IPNI plant ID?
SELECT DISTINCT ?j WHERE { resource:Barley property:IPNI_plant_ID ?j }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q11577> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P961> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q11577 wdt:P961 ?answer}