Question: What are the group or class of chemical substances which start with the letter v
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q17339814 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'v')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25