I want to know the answer to the following question:
What did the group of theorists classify in 1982?
All the background I'm provided with is that "The University of Chicago's 1960–61 Group Theory Year brought together group theorists such as Daniel Gorenstein, John G. Thompson and Walter Feit, laying the foundation of a collaboration that, with input from numerous other mathematicians, classified all finite simple groups in 1982.". Is that enough to answer the question?