TELL ME KETONE WHOSE NAME HAS THE WORD PENTANONE IN IT.
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q170744 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'pentanone')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
ketone: Q170744