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_22 (half_life VARCHAR, discovery_year VARCHAR)
### Question:
What is the half-life discovered in 2003?
### Answer:
SELECT half_life FROM table_name_22 WHERE discovery_year = "2003"