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

### Instruction:
What is the lowest stage number that starts with els alocs and has a middle difficulty?

### Inputs:
table_name: table, columns: ['Stage', 'Start', 'Arrival', 'Duration', 'Difficulty']

### Response:
SELECT MIN Stage FROM table WHERE Difficulty = middle AND Start = els alocs