Methods, computer program products, and systems are presented. The method computer program products, and systems can include, for instance: processing social media system data to establish a relationship graph, wherein the processing includes aggregating relationship graph information of different relationship graphs so that the relationship graph is an aggregated relationship graph; determining that a user is encountering cognitive recall difficulty, wherein the determining includes comparing current input biometric data of the user to baseline biometric data of the user; and responsively to the determining, outputting to the user media content, wherein generating the media content includes performing a search of one or more data source for content using node labels of the relationship graph as keywords and providing a media file for playback by the user, the media file having content returned from the search.