diff -r bd2701bd8142 -r 4ab820b387da server/src/app/Libraries/Mappers/CocoonTextRdfMapper.php
--- a/server/src/app/Libraries/Mappers/CocoonTextRdfMapper.php	Wed Feb 08 16:38:09 2017 +0100
+++ b/server/src/app/Libraries/Mappers/CocoonTextRdfMapper.php	Thu Feb 09 15:05:36 2017 +0100
@@ -149,6 +149,13 @@
     //     }
     // }
 
+    /**
+     * Map date properties to providedCHO.
+     * In the case of a Text, we do nothing as the information must come from the Sound.
+     */
+    protected function addProvidedCHODateProperties($targetRes, $res, $outputGraph) {
+    }
+
     protected function mapWebResources($res, $outputGraph) {
         $resId = CocoonUtils::getIdFromUri($this->getResourceBaseId($res));
         $resUri = CocoonUtils::getCorpusUriFromId($resId);