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

### Instruction:
What is the number of clubs before 2003 with a 4th place winner of Shenzhen Jianlibao?

### 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 fourth-placed = shenzhen jianlibao AND Season < 2003