How many parties were first elected in 1994?
CREATE TABLE table_22115 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Results" text,
    "Candidates" text
)
SELECT COUNT("Party") FROM table_22115 WHERE "First elected" = '1994'
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 parties were first elected in 1994? ### Input: CREATE TABLE table_22115 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Results" text,
    "Candidates" text
) ### Response: SELECT COUNT("Party") FROM table_22115 WHERE "First elected" = '1994'