Complex sentence: Obi-Wan "Ben" Kenobi is a fictional character in the "Star Wars" franchise, within the original trilogy he is portrayed by Sir Alec Guinness, while in the prequel trilogy a younger version of the character is portrayed by Ewan McGregor.
Split into simpler sentences: Obi-Wan "Ben" Kenobi is a fictional character in the "Star Wars" franchise. Within the original trilogy he is portrayed by Sir Alec Guinness, while in the prequel trilogy a younger version of the character is portrayed by Ewan McGregor.