I want to know the answer to the following question:
What is there a large population of in the Chota Valley?
All the background I'm provided with is that "Recently a celebration has gained prominence in the northern part of the Sierra in the Chota Valley in Imbabura which is a zone of a strong afro-Ecuadorian population and so the Carnival is celebrated with bomba del chota music.". Is that enough to answer the question?