Tell me circumstellar disk whose name has the word belt in it.
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q3235978 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'belt')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
circumstellar disk: Q3235978