How many republican incumbents first elected in 1974?
CREATE TABLE table_18214 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Status" text,
    "Opponent" text
)
SELECT COUNT("Incumbent") FROM table_18214 WHERE "Party" = 'Republican' AND "First elected" = '1974'
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 republican incumbents first elected in 1974? ### Input: CREATE TABLE table_18214 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Status" text,
    "Opponent" text
) ### Response: SELECT COUNT("Incumbent") FROM table_18214 WHERE "Party" = 'Republican' AND "First elected" = '1974'