Task: Explanation
Input (English): Paul Adrien Maurice Dirac {'1': ", '2': ", '3': ", '4': "} ( ; 8 August 1902 – 20 October 1984) was an English theoretical physicist who made fundamental contributions to the early development of both quantum mechanics and quantum electrodynamics. He was the Lucasian Professor of Mathematics at the University of Cambridge, a member of the Center for Theoretical Studies, University of Miami, and spent the last decade of his life at Florida State University. Question: When was the English theoretical physicist died who's theory is Dirac hole? Answer: 20 October 1984
Output (English): Paul Adrien Maurice Dirac {1: , 2: , 3: , 4: }  ; 8 August 1902 – 20 October 1984 was an English theoretical physicist who made fundamental contributions to the early development of both quantum mechanics and quantum electrodynamics.