how many party with district being washington 7
CREATE TABLE table_18182 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
)
SELECT COUNT("Party") FROM table_18182 WHERE "District" = 'Washington 7'
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 party with district being washington 7 ### Input: CREATE TABLE table_18182 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
) ### Response: SELECT COUNT("Party") FROM table_18182 WHERE "District" = 'Washington 7'