The webapp provides for each item the link on ECB's website.
Speeches for : Jean-Claude Trichet where "worst" appeared
2011-10-14 : Interview with the Financial Times2011-10-11 : Interview with L'Express
2011-06-01 : Making decisions in an uncertain world
2011-05-15 : Interview with El PaĆs
2010-04-24 : Interview with Expresso
2010-03-17 : Interview with Le Point