For the USAC National Championship, what is the Discipline?
CREATE TABLE table_48352 (
    "Discipline" text,
    "Championship" text,
    "Circuit" text,
    "Event" text,
    "Session" text
)
SELECT "Discipline" FROM table_48352 WHERE "Championship" = 'usac national championship'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: For the USAC National Championship, what is the Discipline? ### Input: CREATE TABLE table_48352 (
    "Discipline" text,
    "Championship" text,
    "Circuit" text,
    "Event" text,
    "Session" text
) ### Response: SELECT "Discipline" FROM table_48352 WHERE "Championship" = 'usac national championship'