Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What year was the main role a character named Guan Yu (關羽)?

### Inputs:
table_name: table, columns: ['Year', 'Chinese Title', 'English', 'Role', 'Character']

### Response:
SELECT MIN Year FROM table WHERE Role = main AND Character = guan yu (關羽)