The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "improvement" appeared
2020-11-21 : Interview with Börsen-Zeitung2019-01-11 : Tenth anniversary of the euro in Slovakia
2017-07-25 : The ECB’s monetary policy stance
2016-03-22 : Shaping the future of Europe's financial market infrastructure
2014-01-13 : “Europe after the warm reboot”