tell  me instruction set architecture that designed by Intel  that starts with x
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q272683 . ?sbj wdt:P287 wd:Q248 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'x')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
instruction set architecture: Q272683 intel: Q248