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

### Instruction:
What is the assembled date of the parliament with an unknown 2nd member who was elected in 1482/83?

### Inputs:
table_name: table, columns: ['Summoned', 'Elected', 'Assembled', 'Dissolved', '1st member', '2nd member']

### Response:
SELECT Assembled FROM table WHERE 2nd member = unknown AND Elected = 1482/83