The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "contributed" appeared
2019-06-12 : Welcome remarks2014-10-10 : Statement by Mario Draghi, President of the ECB, at the Thirtieth meeting of the IMFC
2013-04-16 : Hearing before the Plenary of the European Parliament on the occasion of the adoption of the Resolution on the ECB Annual Report 2011