Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_143352_1 (connected_to_grid VARCHAR, agr_power_station VARCHAR)
### Question:
How many power stations are connected to grid at Heysham 2
### Answer:
SELECT COUNT(connected_to_grid) FROM table_143352_1 WHERE agr_power_station = "Heysham 2"