Question: Who is the founder of the trade union which affiliates Amalgamated Association of Iron and Steel Workers?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Amalgamated_Association_of_Iron_and_Steel_Workers> onto:affiliation ?x . ?x prop:founded ?uri  . ?x rdf:type onto:TradeUnion}