Complex sentence: He won an Academy Award for Best Actor for his performance in "A Free Soul" (1931), and remains perhaps best known for the role of the villainous Henry Potter character in Frank Capra's 1946 film "It's a Wonderful Life".
Split into simpler sentences: He won an Academy Award for Best Actor for his performance in "A Free Soul" (1931). He is known for the role of the villainous Henry Potter character in Frank Capra's 1946 film "It's a Wonderful Life".