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

### Instruction:
What is the highest total cargo of an airport ranked larger than 19 with a code of BKK/VTBS?

### Inputs:
table_name: table, columns: ['Rank', 'Airport', 'Code (IATA/ICAO)', 'Total Cargo (Metric Tonnes)', '% Change']

### Response:
SELECT MAX Total Cargo (Metric Tonnes) FROM table WHERE Code (IATA/ICAO) = bkk/vtbs AND Rank > 19