Complex sentence: Bingham's son, Hiram Bingham III, was an explorer who became a US Senator and Governor of Connecticut, and his grandson Hiram Bingham IV, was the US Vice Consul in Marseille, France during World War II who rescued Jews from the Holocaust.
Split into simpler sentences: Bingham's son, Hiram Bingham III, was an explorer who became a US Senator and Governor of Connecticut. His grandson, Hiram Bingham IV, was the US Vice Consul in Marseille, France during World War II who rescued Jews from the Holocaust.