The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "productive" appeared
2017-12-06 : Challenges for euro area monetary policy in early 20182016-02-04 : Policy needs, knowns and unknowns in the aftermath of the crisis
2014-02-07 : Reviving growth in the euro area
2014-01-13 : “Europe after the warm reboot”