Name the total number of incumbent for first elected of 1944
CREATE TABLE table_72397 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
)
SELECT COUNT("Incumbent") FROM table_72397 WHERE "First elected" = '1944'
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: Name the total number of incumbent for first elected of 1944 ### Input: CREATE TABLE table_72397 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
) ### Response: SELECT COUNT("Incumbent") FROM table_72397 WHERE "First elected" = '1944'