Tell me the binary star that constellation Canis Major and which that starts with the letter s
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q50053 . ?sbj wdt:P59 wd:Q10538 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 's')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
binary star: Q50053 canis major: Q10538