The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "mandates" appeared
2018-10-26 : Central bank independence2016-06-28 : The International Dimension of Monetary Policy
2016-02-04 : How central banks meet the challenge of low inflation
2015-11-05 : Speech to mark the opening of the academic year at the Università Cattolica del Sacro Cuore
2014-02-06 : Introductory statement to the press conference (with Q&A)