user: Question: How many transfer windows coming from Crystal Palace?
Columns: ['N', 'P', 'Name', 'EU', 'Country', 'Age', 'Type', 'Moving from', 'Transfer window', 'Ends', 'Transfer fee', 'Source']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [15.0, 'DF', 'Comminges', 'EU', 'GPE', 26.0, 'Free Transfer', 'Swindon Town', 'Summer', 2010.0, 'Free', 'BBC Sport']
SQL:

assistant: SELECT COUNT("Transfer window") FROM "Table" WHERE "Moving from" = 'Crystal Palace';