Question: Tell me the opera that location of first performance is the Theater auf der Wieden and which that starts with the letter f
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q1344 . ?sbj wdt:P4647 wd:Q673479 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'f')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25