Task: Text Simplification
Input (English): John David Jackson ( January 19 , 1925 – May 20 , 2016 ) was a Canadian – American physics professor emeritus at the University of California , Berkeley and a faculty senior scientist emeritus at Lawrence Berkeley National Laboratory .
Output (English): John David Jackson ( January 19 , 1925 – May 20 , 2016 ) was a Canadian – American physics .