CREATE TABLE table_59643 ("Team" CLOB, "Driver" CLOB, "Class" CLOB, "Chassis" CLOB, "Engine" CLOB, "Rounds" CLOB)

What is the chassis of rahel frey's volkswagen engine?
SELECT "Chassis" FROM table_59643 WHERE "Engine" = 'volkswagen' AND "Driver" = 'rahel frey'
SELECT "Chassis" FROM "table_59643" WHERE "Driver" = 'rahel frey' AND "Engine" = 'volkswagen'