Question: On 5th August 2011 a "secret" letter to Italian government was written by Jean Claude Trichet and the Chairman of what?
Related documents: [0]  [DOC] Mario Draghi {'1': ", '2': ", '3': 'OMRI', '4': "} (] ; born 3 September 1947) is an Italian economist who has served as President of the European Central Bank since November 2011. He previously served as Chairman of the Financial Stability Board from 2009 to 2011 and Governor of the Bank of Italy from 2005 to 2011. [END] 
[1]  [DOC] On 5th August 2011, during dramatic crisis of European banks, the former governor of ECB, Jean Claude Trichet, together with Mario Draghi, wrote a "secret" letter to Italian government, at the time led by Silvio Berlusconi, in which they pushed for a series of economic measures "to be implemented as soon as possible". By complying of these measures, the support of ECB was implicitly conditioned by massive purchase of Italian bonds on the secondary market. [END] 
Answer: 
the Financial Stability Board
the Financial Stability Board