What is <material used> of <The Motherland Calls> ?
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Which means  {material used} at {The Motherland Calls} ?
SELECT DISTINCT ?u WHERE { resource:The_Motherland_Calls property:made_from_material ?u }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1601986> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P186> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q1601986 wdt:P186 ?answer}
wire rope concrete