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_1139087_2 (grand_prix VARCHAR, constructor VARCHAR, fastest_lap VARCHAR)
### Question:
How many events did nigel mansell drive the fastest and a mclaren - honda win?
### Answer:
SELECT COUNT(grand_prix) FROM table_1139087_2 WHERE constructor = "McLaren - Honda" AND fastest_lap = "Nigel Mansell"