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

### Instruction:
What is the sum of Population (1 July 2005 est.), when Area (km²) is less than 5,131, when Population density (per km²) is less than 180, when Subdivisions is Parishes, and when Capital is Roseau?

### Inputs:
table_name: table, columns: ['Name', 'Subdivisions', 'Area (km²)', 'Population (1 July 2005 est.)', 'Population density (per km²)', 'Capital']

### Response:
SELECT SUM Population (1 July 2005 est.) FROM table WHERE Area (km²) < 5,131 AND Population density (per km²) < 180 AND Subdivisions = parishes AND Capital = roseau