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_28180840_15 (semifinal__week_ VARCHAR, age_s_ VARCHAR)
### Question:
How many performers are 29 that made it to the semi finals?
### Answer:
SELECT semifinal__week_ FROM table_28180840_15 WHERE age_s_ = "29"