Name a doll created by Mattel that contains the word "ken " in its name
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q168658 . ?sbj wdt:P176 wd:Q596139 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'ken')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
doll: Q168658 mattel: Q596139