UPDATE 3-Chad becomes first country to ask for debt overhaul under G20 common framework
* Creditors to begin talks soon - IMF * Chad’s total debt exposure around $3 billion * (Adds IMF comment on talks starting, debt data) WASHINGTON, Jan 27 (Reuters) - Chad has officially requested a debt restructuring, the first country to do so under a new common framework hammered out last year by China and other Group of 20 countries with the help of the Paris Club, the International Monetary Fund said on Wednesday. An IMF official said official creditors would soon begin discussions on what will be the first test of the new framework and whether China, the world’s biggest official cred...