The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "assessed" appeared
2020-07-02 : In the spirit of European cooperation2018-01-30 : The limits of central bank financing in resolution
2017-01-16 : Digital Base Money: an assessment from the ECB's perspective
2013-10-24 : Interview with Het Financieele Dagblad