Question: What are the stellar classification which start with the letter t
Paraphrase: What stellar classification starts with the letter 't'?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q179600 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 't')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: T-type brown dwarf, T-type brown dwarf