Question: What are the system which start with the letter v
Paraphrase: What are the framework which begin with the letter v
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q403523 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'v')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Vendian, Vendian, Vaalbaran, Vaalbaran