Question: what are the alloy which start with the letter z
Paraphrase: what are the amalgam which begin with the letter z
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q37756 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'z')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Zinag, Zinag, zinc-copper couple, zinc-copper couple, Zain, Zain, Zamak, Zamak