The webapp provides for each item the link on ECB's website.
Speeches for : Benoit Coure where "observed" appeared
2018-10-26 : The international dimension of the ECB’s asset purchase programme: an update2014-04-22 : Interview with Le Monde
2013-09-02 : Outright Monetary Transactions, one year on
2012-06-16 : The importance of money markets