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

### Instruction:
What were the starting odds for the opening odds of 2-1?

### Inputs:
table_name: table, columns: ['Post', 'Horse name', 'Trainer', 'Jockey', 'Opening Odds', 'Starting Odds', 'Finishing Pos.']

### Response:
SELECT Starting Odds FROM table WHERE Opening Odds = 2-1