What is the career W-L of the tournament that is listed as A in 1968 and 4R in 1974?
CREATE TABLE table_51819 (
    "Tournament" text,
    "1968" text,
    "1969" text,
    "1970" text,
    "1971" text,
    "1972" text,
    "1973" text,
    "1974" text,
    "1975" text,
    "1976" text,
    "1977" text,
    "1978" text,
    "1979" text,
    "Career SR" text,
    "Career W\u2013L" text,
    "Career Win %" text
)
SELECT "Career W\u2013L" FROM table_51819 WHERE "1968" = 'a' AND "1974" = '4r'
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: What is the career W-L of the tournament that is listed as A in 1968 and 4R in 1974? ### Input: CREATE TABLE table_51819 (
    "Tournament" text,
    "1968" text,
    "1969" text,
    "1970" text,
    "1971" text,
    "1972" text,
    "1973" text,
    "1974" text,
    "1975" text,
    "1976" text,
    "1977" text,
    "1978" text,
    "1979" text,
    "Career SR" text,
    "Career W\u2013L" text,
    "Career Win %" text
) ### Response: SELECT "Career W\u2013L" FROM table_51819 WHERE "1968" = 'a' AND "1974" = '4r'