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

### Instruction:
What year was the structure in greensboro, north carolina considered tallest?

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

### Response:
SELECT Year FROM table WHERE Town = greensboro, north carolina