The webapp provides for each item the link on ECB's website.
Speeches for : Jean-Claude Trichet where "impossible" appeared
2011-02-01 : I am still learning - The legacy of Tommaso Padoa-Schioppa2010-04-19 : Eulogy to SÅ‚awomir Skrzypek, President of Narodowy Bank Polski
2008-06-02 : Address at the ceremony to mark the 10th anniversary of the European Central Bank and the European System of Central Banks