What is the chassis for offy engine and 25th finish?
CREATE TABLE table_68548 (
    "Year" real,
    "Chassis" text,
    "Engine" text,
    "Start" text,
    "Finish" text,
    "Entrant" text
)
SELECT "Chassis" FROM table_68548 WHERE "Engine" = 'offy' AND "Finish" = '25th'
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: What is the chassis for offy engine and 25th finish? ### Input: CREATE TABLE table_68548 (
    "Year" real,
    "Chassis" text,
    "Engine" text,
    "Start" text,
    "Finish" text,
    "Entrant" text
) ### Response: SELECT "Chassis" FROM table_68548 WHERE "Engine" = 'offy' AND "Finish" = '25th'