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

### Instruction:
What is the number of clubs when Dalian Shide won and Sichuan Quanxing won 4th?

### Inputs:
table_name: table, columns: ['Season', 'Winners', 'Runners-up', 'Third-place', 'fourth-placed', 'Number of clubs']

### Response:
SELECT AVG Number of clubs FROM table WHERE Winners = dalian shide AND fourth-placed = sichuan quanxing