Complex sentence: His most famous role was the guardian angel Clarence Odbody in the 1946 film classic "It's a Wonderful Life"; in addition, he received an Academy Award nomination for his supporting role in "Mrs. Miniver".
Split into simpler sentences: His most famous role was the guardian angel Clarence Odbody in the 1946 film classic "It's a Wonderful Life". He also received an Academy Award nomination for his supporting role in "Mrs. Miniver".