Which is the Avion that has home venue the XL Center and contains the word boston in it's name?
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q13393265 . ?sbj wdt:P115 wd:Q1783634 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'boston')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
basketball team: Q13393265 xl center: Q1783634