The webapp provides for each item the link on ECB's website.
Speeches for : Jean-Claude Trichet where "obligation" appeared
2011-10-07 : Interview on the Cultural Days of the ECB – Italy 20112011-06-16 : Interview with The Times
2009-07-16 : Introductory remarks at the signing ceremony for the T2S memorandum of understanding
2009-02-16 : Macroeconomic policies, imbalances and the need to avoid going back to the status quo ante