What national historic trails in the country of the USA have the word trail in their name?
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q6973377 . ?sbj wdt:P17 wd:Q30 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'trail')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
national historic trail: Q6973377 united states of america: Q30