Task: Sentence Expansion
Input (English): Immanuel Maurice Wallerstein ( ; September 28 , 1930 – August 31 , 2019 ) was an American sociologist , economic historian and world-systems analyst .
Output (English): Immanuel Maurice Wallerstein ( ; September 28 , 1930 – August 31 , 2019 ) was an American sociologist , economic historian and world-systems analyst , arguably best known for his development of the general approach in sociology which led to the emergence of his world-systems approach .