Which year is that has a Entrant of belond equa-flow / calif. muffler?
CREATE TABLE table_68100 (
    "Year" real,
    "Entrant" text,
    "Chassis" text,
    "Engine" text,
    "Points" real
)
SELECT "Year" FROM table_68100 WHERE "Entrant" = 'belond equa-flow / calif. muffler'
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: Which year is that has a Entrant of belond equa-flow / calif. muffler? ### Input: CREATE TABLE table_68100 (
    "Year" real,
    "Entrant" text,
    "Chassis" text,
    "Engine" text,
    "Points" real
) ### Response: SELECT "Year" FROM table_68100 WHERE "Entrant" = 'belond equa-flow / calif. muffler'