The webapp provides for each item the link on ECB's website.
Speeches for : Vitor Constancio where "natural" appeared
2018-05-04 : Past and future of the ECB monetary policy2016-06-15 : The challenge of low real interest rates for monetary policy
2016-03-11 : In defence of Monetary Policy
2013-05-24 : Implications of the SSM on the ESFS