The webapp provides for each item the link on ECB's website.
Speeches for : Jean-Claude Trichet where "american" appeared
2007-12-07 : The US economy, the euro area economy, and their central banks2007-10-16 : Interview with Izvestia
2005-01-20 : Interview with Les Echos
2004-06-18 : Interview with Jean-Claude Trichet, President of the European Central Bank