Complex sentence: The US National Science Foundation (NSF) requested a review from David J. Farber at the University of Delaware, who assigned the task to his graduate student Dave Crocker who was already active in the development of electronic mail.
Split into simpler sentences: The US National Science Foundation (NSF) requested a review from David J. Farber at the University of Delaware. Farber assigned the task to his graduate student Dave Crocker who was already active in the development of electronic mail.