Give me {international organization} that {office held by head of the organisation} {Director-General of UNESCO} and which that starts with {'u'}
what is international organization  organization by unesco and also which starts with letter u
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q484652 . ?sbj wdt:P2388 wd:Q28784183 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'u')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
SELECT DISTINCT ?sbj ?sbj_label { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?sbj . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P31> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q484652>. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?sbj . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2388> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q28784183>. ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'u')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25
what is worldwide company employer through unesco and additionally which starts with letter u