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

### Instruction:
When is The Opponents of lincoln city and a H / A of a?

### Inputs:
table_name: table, columns: ['Date', 'Opponents', 'H / A', 'Result F – A', 'Attendance']

### Response:
SELECT Date FROM table WHERE Opponents = lincoln city AND H / A = a