query: select ?person ?personLabel ?christianismLabel where {
    ?person wdt:P279*/wdt:P31 wd:Q5 .
    ?person wdt:P140 ?christianism .
    ?christianism wdt:P279* wd:Q5043 . # christianity and subclasses 
    SERVICE wikibase:label {
   bd:serviceParam wikibase:language "fr, en" .
   }
  }