The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "stimulus" appeared
2018-07-01 : Are the economy and monetary policy at a turning point – and where are the European and US economies headed?2017-12-06 : Challenges for euro area monetary policy in early 2018
2016-04-09 : Scope and Limits of Monetary Policy
2016-02-02 : Interview with Wall Street Journal