The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "chart" appeared
2017-03-13 : Moving to the Frontier: Promoting the Diffusion of Innovation2016-10-25 : Stability, equity and monetary policy
2015-05-22 : Structural reforms, inflation and monetary policy
2015-05-14 : The ECB's recent monetary policy measures: Effectiveness and challenges