What are the federal holidays in the United States which start with the letter thanksgiving
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q5440534 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'thanksgiving')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
federal holiday in the united states: Q5440534