Complex sentence: The "Centre des archives contemporaines" (CAC), French for "Centre for Contemporary Archives", opened in Fontainebleau in 1969, is the repository for documents issued by the French central state since 1958 (founding of the Fifth Republic).
Split into simpler sentences: The "Centre des archives contemporaines" (CAC), French for "Centre for Contemporary Archives", opened in Fontainebleau in 1969. It is the repository for documents issued by the French central state since 1958 (founding of the Fifth Republic).