original_query: What is Na Young-seok best known for producing?
query: What is Na Young-seok best known for producing?
answer: Na Young-seok is best known for producing popular variety-reality shows such as 1 Night 2 Days, New Journey to the West, Grandpas Over Flowers, Three Meals a Day, Youn's Kitchen, and Youn's Stay, as well as their spin-offs.