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_3 (date VARCHAR, runner_s__up VARCHAR, tournament VARCHAR)
### Question:
Which Date has a Runner(s)-up of bernhard langer, and a Tournament of at&t championship?
### Answer:
SELECT date FROM table_name_3 WHERE runner_s__up = "bernhard langer" AND tournament = "at&t championship"