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

### Instruction:
What episode was the first appearance of the character who appears 7 times in season 4?

### Inputs:
table_name: table, columns: ['Character', 'Played by', 'Season 1', 'Season 2', 'Season 3', 'Season 4', 'First Appearance']

### Response:
SELECT First Appearance FROM table WHERE Season 4 = 7