Tell me the expedition that has a start point in St. Louis and starts with the letter e?
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q2401485 . ?sbj wdt:P1427 wd:Q38022 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'e')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
expedition: Q2401485 st. louis: Q38022