Which HyperText Markup Language series W3C recommendation comprises of  the letters html5 in its name?
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q2661442 . ?sbj wdt:P179 wd:Q8811 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'html5')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
w3c recommendation: Q2661442 hypertext markup language: Q8811