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

### Instruction:
What is Viewers, when 18-49 is "N/A", and when Weekly Winner is "Wedding DJ Chris Dixon"?

### Inputs:
table_name: table, columns: ['Air Date', 'Rating', '18-49', 'Viewers', 'Weekly Winner']

### Response:
SELECT Viewers FROM table WHERE 18-49 = n/a AND Weekly Winner = wedding dj chris dixon