user: Question: In how many countries is Itaipu a supply point for electricity?
Columns: ['Entities', 'Country', 'Supply point', 'Voltage (kV)', 'Power (MW)']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['FURNAS, ELECTROSUL, ELECTROBRAS', 'Brazil', 'Itaipu', 500.0, 7000.0]
SQL:

assistant: SELECT COUNT("Country") FROM "Table" WHERE "Supply point" = 'Itaipu';