Question: Which is the geochronological unit which contains the word silurian in it's name?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q6156156 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'silurian')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25