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

### Instruction:
What was the average rank for the film directed by roland emmerich under the studio of 20th century fox?

### Inputs:
table_name: table, columns: ['Rank', 'Title', 'Studio', 'Director', 'Worldwide Gross']

### Response:
SELECT AVG Rank FROM table WHERE Studio = 20th century fox AND Director = roland emmerich