Question: What is the name of the mineral that has an hexagonal crystal system and that has the word "lonsdaleite" in its name?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q429795 . ?sbj wdt:P556 wd:Q663314 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'lonsdaleite')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25