How many were first elected in California 7?
CREATE TABLE table_23280 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
)
SELECT "First elected" FROM table_23280 WHERE "District" = 'California 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 were first elected in California 7? ### Input: CREATE TABLE table_23280 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
) ### Response: SELECT "First elected" FROM table_23280 WHERE "District" = 'California 7'