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

### Instruction:
What is the rank of the airport with a  freight ( metric tonnes ) of 23791?

### Inputs:
table_name: table, columns: ['Rank', 'Airport', 'Total Passengers', '% Change 2008/2009', 'International Passengers', 'Domestic Passengers', 'Transit Passengers', 'Aircraft Movements', 'Freight ( Metric Tonnes )']

### Response:
SELECT Rank FROM table WHERE Freight ( Metric Tonnes ) = 23791