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

### Instruction:
When were the years on which warwick had a population greater than 10,956 and allora had a population bigger than 2,439?

### Inputs:
table_name: table, columns: ['Year', 'Population (Region total)', 'Population (Stanthorpe)', 'Population (Warwick)', 'Population (Allora)', 'Population (Glengallan)', 'Population (Rosenthal)']

### Response:
SELECT SUM Year FROM table WHERE Population (Warwick) = 10,956 AND Population (Allora) > 2,439