How many different engines are there for the model with model designation 97G00?
CREATE TABLE table_23970 (
    "Model Type" text,
    "Model Designation" text,
    "Engine" text,
    "Wheelbase (mm/inch)" text,
    "GVW (kg/ton)" text,
    "Axle Ratio" text
)
SELECT COUNT("Engine") FROM table_23970 WHERE "Model Designation" = '97G00'
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: How many different engines are there for the model with model designation 97G00? ### Input: CREATE TABLE table_23970 (
    "Model Type" text,
    "Model Designation" text,
    "Engine" text,
    "Wheelbase (mm/inch)" text,
    "GVW (kg/ton)" text,
    "Axle Ratio" text
) ### Response: SELECT COUNT("Engine") FROM table_23970 WHERE "Model Designation" = '97G00'