The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "wealth" appeared
2018-10-26 : Central bank independence2016-10-25 : Stability, equity and monetary policy
2016-03-11 : Interview with The Guardian
2015-05-14 : The ECB's recent monetary policy measures: Effectiveness and challenges
2013-05-06 : The euro, monetary policy and reforms