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

### Instruction:
What is the main use of the structure that was in redfield, arkansas before 2004?

### Inputs:
table_name: table, columns: ['Pinnacle height', 'Year', 'Structure type', 'Main use', 'Country', 'Town']

### Response:
SELECT Main use FROM table WHERE Year < 2004 AND Town = redfield, arkansas