Name building located on 5th Avenue that starts with letter B
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q1021645 . ?sbj wdt:P669 wd:Q109858 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'b')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
office building: Q1021645 fifth avenue: Q109858