The webapp provides for each item the link on ECB's website.
Speeches for : Jean-Claude Trichet where "twelve" appeared
2011-06-19 : The euro area and its role in the global economy2011-05-26 : The ECB's response to the crisis
2011-05-02 : Short Address in honour of Axel Weber
2008-01-12 : The successful entry of Malta into the euro area
2005-12-23 : Interview with Der Spiegel