The webapp provides for each item the link on ECB's website.
Speeches for : Peter Praet where "understand" appeared
2018-11-02 : Interview with BdP Revista, staff magazine of Banco de Portugal2017-09-16 : Interview with De Tijd
2017-06-22 : Interview with Der Spiegel
2016-12-20 : Interview with the Telegraaf
2016-12-14 : Interview with Die Zeit