The webapp provides for each item the link on ECB's website.
Speeches for : Sabine Lautenschlager where "negative" appeared
2019-08-30 : Interview with Market News2018-11-26 : Interview with Agence France-Presse
2016-09-13 : Monetary policy in uncertain times - the ECB and the crisis
2015-11-23 : Stormy times - how is the ECB handling them?
2015-09-28 : Reintegrating the banking sector into society: earning and re-establishing trust