Question: On 5th August 2011 a "secret" letter to Italian government was written by Jean Claude Trichet and the Chairman of what?
Sentence (from "Mario Draghi"): 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.
Relevant evidence: Yes