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

### Instruction:
What is the average Singapore value with a London value less than 0?

### Inputs:
table_name: table, columns: ['New Zealand', 'Hong Kong', 'Singapore', 'London', 'Brisbane', 'Cardiff', 'Durban', 'Santiago', 'Mar Del Plata', 'Beijing', 'Kuala Lumpur', 'Points']

### Response:
SELECT AVG Singapore FROM table WHERE London < 0