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 Customers (date_became_customer VARCHAR, first_name VARCHAR, last_name VARCHAR)
### Question:
When did customer with first name as Carole and last name as Bernhard became a customer?
### Answer:
SELECT date_became_customer FROM Customers WHERE first_name = "Carole" AND last_name = "Bernhard"