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_50 (quantity_rebuilt INTEGER, class VARCHAR)
### Question:
What the least quantity having a T2A class?
### Answer:
SELECT MIN(quantity_rebuilt) FROM table_name_50 WHERE class = "t2a"