The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "evolution" appeared
2019-02-04 : The changing role of central banking2018-04-27 : Reflections on monetary policy in the euro area
2016-09-26 : The next steps in the evolution of the Eurosystem's market infrastructure
2016-09-07 : Reaching for perfection – building the market infrastructure of tomorrow
2016-02-04 : Policy needs, knowns and unknowns in the aftermath of the crisis