Complex sentence: Fred Bowerman Kniffen (January 18,1900--May 19,1993) was an American Geographer and professor in the Department of Geography and Anthropology at Louisiana State University for over 64 years.
Split into simpler sentences: Fred Bowerman Kniffen (January 18,1900--May 19,1993) was an American Geographer. Kniffen was a professor in the Department of Geography and Anthropology at Louisiana State University for over 64 years.