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_name_41 (year_built VARCHAR, model VARCHAR)
### Question:
In what year was the ctc-3 model built?
### Answer:
SELECT year_built FROM table_name_41 WHERE model = "ctc-3"