Question: For the USAC National Championship, what is the Discipline?
SQL: SELECT "Discipline" FROM "2-1632486-11" WHERE "Championship" = 'USAC National Championship';

Question: In the Indianapolis Sweepstakes Race session, what is the championship?
SQL: SELECT "Championship" FROM "2-1632486-11" WHERE "Session" = 'Race' AND "Event" = 'Indianapolis Sweepstakes';

Question: What circuit is the Sprint Cup Series championship?
SQL: SELECT "Circuit" FROM "2-1632486-11" WHERE "Championship" = 'Sprint Cup Series';