Change Wikidata query to return xsd:dateTime; Use rdfs:label instead of wdt:P1476.

static/wikidata_groundtruth.sparql

@@ -8,7 +8,7 @@ DISTINCT (?movie AS ?Movie)
 (GROUP_CONCAT(DISTINCT ?director;separator="|") AS ?Director)
 (GROUP_CONCAT(DISTINCT ?author;separator="|") AS ?Author)
 (GROUP_CONCAT(DISTINCT ?cast_member;separator="|") AS ?Cast)
-(GROUP_CONCAT(DISTINCT YEAR(?publish_date);separator="|") AS ?Published)
+(GROUP_CONCAT(DISTINCT ?publish_date;separator="|") AS ?Published)
 (GROUP_CONCAT(DISTINCT ?genre;separator="|") AS ?Genre)
 (GROUP_CONCAT(DISTINCT ?duration;separator="|") AS ?Duration)
 (GROUP_CONCAT(DISTINCT ?description;separator="|") AS ?Description)
@@ -59,6 +59,7 @@ HAVING (?min_dob >= 1970)
 
   }
   OPTIONAL {?movie wdt:P1476 ?title.} # titel oder label ?
+  OPTIONAL {?movie rdfs:label ?title FILTER (LANG(?title) = "en")} # titel oder label ?
   OPTIONAL {?movie wdt:P57 ?director.}
   OPTIONAL {?movie wdt:P58 ?author.}
   OPTIONAL {?movie wdt:P161 ?cast_member.}