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

### Instruction:
What is the capacity of the stadium with a rank lower than 31 located in the city of Belém ?

### Inputs:
table_name: table, columns: ['Rank', 'Stadium', 'Capacity', 'City', 'Country']

### Response:
SELECT Capacity FROM table WHERE Rank < 31 AND City = belém