The webapp provides for each item the link on ECB's website.
Speeches for : Benoit Coure where "prolonged" appeared
2019-07-17 : Exchange of views with members of the High Council of Public Finance2016-11-28 : Greece: progress achieved and challenges ahead
2016-10-28 : Monetary policy in a low-growth environment
2013-06-25 : Duration Risk in the Financial System