The webapp provides for each item the link on ECB's website.
Speeches for : Vitor Constancio, Mario Draghi where "yields" appeared
2013-01-10 : Introductory statement to the press conference (with Q&A)2012-10-04 : Introductory statement to the press conference (with Q&A)
2012-09-06 : Introductory statement to the press conference (with Q&A)