Which is the triumphal arch that Jean Chalgrin was the architect and contains the word arc in it's name!
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q143912 . ?sbj wdt:P84 wd:Q525487 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'arc')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
triumphal arch: Q143912 jean chalgrin: Q525487