Task: Text Simplification
Input (English): Poul Oluf Nyrup Rasmussen ( -RSB- , informally Poul Nyrup , born 15 June 1943 ) , was Prime Minister of Denmark from 25 January 1993 to 27 November 2001 and President of the Party of European Socialists ( PES ) from 2004 to 2011 .
Output (English): He was the Prime Minister of Denmark from 25 January 1993 to 27 November 2001 and President of the Party of European Socialists ( PES ) from 2004 to 2011 .