user: Question: What is the lowest stage number that starts with Els Alocs and has a Middle difficulty?
Columns: ['Stage', 'Start', 'Arrival', 'Duration', 'Difficulty']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Maó', 'Es Grau', '3 h 30 min', 'Middle']
SQL:

assistant: SELECT MIN("Stage") FROM "Table" WHERE "Difficulty" = 'Middle' AND "Start" = 'Els Alocs';