Complex sentence: Scott Swan is a screenwriter best known for his work on seasons one and two of "Masters of Horror", Swan has been working with his writing partner Drew McWeeny for 20 years, since the two met in high school.
Split into simpler sentences: Scott Swan is a screenwriter best known for his work on seasons one and two of "Masters of Horror". He has been working with his writing partner Drew McWeeny for 20 years, since the two met in high school.