How many networks aired the franchise in 1981 only?
CREATE TABLE table_17681 (
    "Region/Country" text,
    "Local name" text,
    "Network" text,
    "Dates aired" text,
    "Starring" text
)
SELECT COUNT("Network") FROM table_17681 WHERE "Dates aired" = '1981'
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 networks aired the franchise in 1981 only? ### Input: CREATE TABLE table_17681 (
    "Region/Country" text,
    "Local name" text,
    "Network" text,
    "Dates aired" text,
    "Starring" text
) ### Response: SELECT COUNT("Network") FROM table_17681 WHERE "Dates aired" = '1981'