The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "slack" appeared
2018-06-19 : Monetary policy in the euro area2018-03-14 : Monetary Policy in the Euro Area
2017-11-17 : Monetary policy and the outlook for the economy
2017-06-27 : Accompanying the economic recovery
2016-06-28 : The International Dimension of Monetary Policy
2015-12-04 : Global and domestic inflation