What are the invasion which start with the letter  migration
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q467011 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'migration')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
invasion: Q467011