BELFAST (Reuters) - Irish nationalist party Sinn Fein said on Wednesday that its talks with the pro-British Democratic Unionist Party aimed at re-establishing a power-sharing government in Northern Ireland had failed.   Sinn Fein is disappointed that after the last few weeks of negotiations that it has ended in failure,  Sinn Fein s leader in Northern Ireland, Michelle O Neill, told journalists.  We did our best to be flexible.  She called on the British and Irish government s  to act urgently to deliver equality  in Northern Ireland following the failure of the assembly to deliver it, citing the terms of the 1998 Good Friday peace deal.  
Sinn Fein says Northern Ireland talks have failed