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_56 (southbridge VARCHAR, cpu_support VARCHAR)
### Question:
What is the Southbridge when the CPU support was athlon, athlonxp, duron( socketa ), alpha21264?
### Answer:
SELECT southbridge FROM table_name_56 WHERE cpu_support = "athlon, athlonxp, duron( socketa ), alpha21264"