Question: What guns are classified as 76 mm?
Paraphrase: Which guns are 76 mm?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q15142894 . ?ent wdt:P2077 ?obj . ?ent wdt:P279 wd:Q47518821 } ORDER BY DESC(?obj)LIMIT 5