The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "annual" appeared
2020-10-08 : European economic governance: early lessons from the crisis2018-10-10 : Monetary policy in the euro area - a brief assessment
2018-07-01 : Are the economy and monetary policy at a turning point – and where are the European and US economies headed?
2017-07-25 : The ECB’s monetary policy stance