The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "persist" appeared
2019-03-27 : Monetary policy in the euro area2019-01-24 : Introductory statement to the press conference (with Q&A)
2018-06-19 : Monetary policy in the euro area
2017-06-27 : Accompanying the economic recovery
2014-05-26 : Monetary policy in a prolonged period of low inflation