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

### Instruction:
What is the birthday of the player who has Years at Club of 1951?

### Inputs:
table_name: table, columns: ['Debut year', 'Player', 'Date of birth', 'Games', 'Goals', 'Years at club']

### Response:
SELECT Date of birth FROM table WHERE Years at club = 1951