name a textile fibre made of Bombyx mori that starts with letter S
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q3071311 . ?sbj wdt:P1582 wd:Q134747 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 's')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
: Q3071311 bombyx mori: Q134747