Complex sentence: During the crisis within the CPGB, John Saville and Edward Palmer Thompson created a journal of dissident Communism named the "Reasoner", taking their title form an early 19th century publication.
Split into simpler sentences: During the crisis within the CPGB, two men John Saville and Edward Palmer Thompson created a journal of dissident Communism named the "Reasoner". Thompson and Saville took their title form an early 19th century publication.