Name a doll created by Mattel that start with letter K
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q168658 . ?sbj wdt:P176 wd:Q596139 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'k')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
doll: Q168658 mattel: Q596139