user: Question: What is the date for the La Granja de San Ildefonso to Alto de Navacerrada course?
Columns: ['Date', 'Course', 'Distance', 'Type', 'Winner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['30 August', 'Granada', 'km (mi)', 'Team time trial', 'Liquigas']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Course" = 'La Granja de San Ildefonso to Alto de Navacerrada';