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

### Instruction:
In how many countries is Itaipu a supply point for electricity?

### Inputs:
table_name: table, columns: ['Entities', 'Country', 'Supply point', 'Voltage (kV)', 'Power (MW)']

### Response:
SELECT COUNT Country FROM table WHERE Supply point = Itaipu