Complex sentence: He is also the fraternal twin brother of Princess Leia Organa, foster daughter of Senator Bail Organa and like Luke a leader of the Rebellion against the Empire; father of Ben Skywalker; and ancestor of Cade Skywalker.
Split into simpler sentences: He is also the fraternal twin brother of Princess Leia Organa, foster daughter of Senator Bail Organa and like Luke a leader of the Rebellion against the Empire. In the Expanded Universe, he is the father of Ben Skywalker; and ancestor of Cade Skywalker.