Complex sentence: He sacrificed his degree, leaving the University in 1935 to shore up his father's newspaper, the "Winchester Evening Star"; in doing so, he also gave up an opportunity to join a global business in Paris.
Split into simpler sentences: He sacrificed his degree, leaving the University in 1935, to shore up his father's newspaper, the "Winchester Evening Star". In doing so, he also gave up an opportunity to join a global business in Paris.