Complex sentence: Students came from all across Europe to witness Charcot's clinical demonstrations: among them--in 1885--was the 29 year old Sigmund Freud who translated Charcot's lectures into German, and whose deconstruction of the lectures on hysteria formed the foundations of psychoanalysis.
Split into simpler sentences: Students came from all across Europe to witness Charcot's clinical demonstrations: among them--in 1885--was the 29 year old Sigmund Freud who translated Charcot's lectures into German. Freud's deconstruction of the lectures on hysteria formed the foundations of psychoanalysis.