The webapp provides for each item the link on ECB's website.
Speeches for : Sabine Lautenschlager where "levels" appeared
2019-05-10 : Towards a more cyber secure financial system: the role of central banks2018-05-14 : Europe – past, present and future
2016-03-01 : Navigating uncertainty - governance, risk management and leveraged finance
2014-07-07 : Low inflation as a challenge for monetary policy and financial stability?