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

### Instruction:
What is the namesake of the feature found at 189.5w longitude?

### Inputs:
table_name: table, columns: ['Name', 'Latitude', 'Longitude', 'Diameter', 'Year named', 'Namesake']

### Response:
SELECT Namesake FROM table WHERE Longitude = 189.5W