The webapp provides for each item the link on ECB's website.
Speeches for : Christine Lagarde where "signed" appeared
2022-11-07 : Digital euro: a common European project2022-07-23 : Ensuring price stability
2021-12-31 : Happy anniversary to euro cash!
2021-11-26 : Change and continuity in law
2020-09-10 : Payments in a digital world