SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Amalgamated_Association_of_Iron_and_Steel_Workers> <http://dbpedia.org/ontology/affiliation> ?x . ?x <http://dbpedia.org/property/founded> ?uri . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TradeUnion>}
Who is the founder of the trade union which affiliates with Amalgamated Association of Iron and Steel Workers?
SELECT DISTINCT ?v WHERE { resource:Amalgamated_Association_of_Iron_and_Steel_Workers property:affiliation ?r . ?r rdf:type ontology:Trade_Union . ?r property:founded ?v }
1935-11-14, Pittsburgh
The founder of the trade union which affiliates with Amalgamated Association of Iron and Steel Workers is [1935-11-14, Pittsburgh].
The founder of the union that joined the United Steelworkers Association is [1935-11-14, Pittsburgh].