Complex sentence: Birgitte Caroline "Nena" von Schlebrügge (born January 8,1941 in Mexico City) is a former fashion model of the 1950s and 1960s and is now the managing director of Menla Mountain Retreat.
Split into simpler sentences: Birgitte Caroline "Nena" von Schlebrügge (born January 8,1941, in Mexico City) was a fashion model in the 1950s and 1960s. She is now the managing director of Menla Mountain Retreat.