<human>:  Who is the main character in the movie, ‘Forks Over Knives’?
<bot>: The main character is a doctor named Caldwell Esselstyn. He is a surgeon at the Cleveland Clinic who specializes in treating patients with heart disease. He has been featured in a documentary called Forks Over Knives, which is a film about the benefits of a plant-based diet. The film argues that the way we eat today is responsible for many of the health problems facing the world today.