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_229917_2 (tail_number VARCHAR, brief_description VARCHAR)
### Question:
What's the tail number of the airplane involved in the accident described as crashed?
### Answer:
SELECT tail_number FROM table_229917_2 WHERE brief_description = "Crashed"