The webapp provides for each item the link on ECB's website.
Speeches for : Vitor Constancio where "keynesian" appeared
2017-11-24 : Ricardo Reis’ contribution to Macroeconomics2017-09-25 : Developing models for policy analysis in central banks
2015-11-05 : Understanding Inflation Dynamics and Monetary Policy in a Low Inflation Environment
2015-08-29 : Understanding Inflation Dynamics and Monetary Policy