What is the number of networks when the size of rest bit field is 8?
CREATE TABLE table_46698 (
    "Class" text,
    "Leading bits" real,
    "Size of network number bit field" text,
    "Size of rest bit field" text,
    "Number of networks" text,
    "Addresses per network" text,
    "Start address" text,
    "End address" text
)
SELECT "Number of networks" FROM table_46698 WHERE "Size of rest bit field" = '8'
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 number of networks when the size of rest bit field is 8? ### Input: CREATE TABLE table_46698 (
    "Class" text,
    "Leading bits" real,
    "Size of network number bit field" text,
    "Size of rest bit field" text,
    "Number of networks" text,
    "Addresses per network" text,
    "Start address" text,
    "End address" text
) ### Response: SELECT "Number of networks" FROM table_46698 WHERE "Size of rest bit field" = '8'