Complex sentence: Robert W. Mitchell (born April 25,1933 in Wellington, Texas--died March 18,2010 in San Antonio, Texas) was an American invertebrate zoologist and photographer who was particularly active in the study of the biology of caves.
Split into simpler sentences: Robert W. Mitchell (born April 25,1933 in Wellington, Texas--died March 18,2010 in San Antonio, Texas) was an American invertebrate zoologist and photographer. He was particularly active in the study of the biology of caves.