Complex sentence: The smartest of the quartett, Karl Vierstein is sometimes nicknamed Computer because he has an eiditic memory; whatever he's read he never forgets-perhaps because his father is a professor for Maths at the local university.
Split into simpler sentences: The smartest of the quartett, Karl Vierstein is sometimes nicknamed Computer. He also has an eiditic memory; whatever he's read he never forgets-perhaps because his father is a professor for Maths at the local university.