What is the highest number of viewers for the episode that has an 18-49 of 1.8/6?
CREATE TABLE table_50919 (
    "Episode" text,
    "Air Date" text,
    "Timeslot" text,
    "18-49" text,
    "Viewers" real
)
SELECT MAX("Viewers") FROM table_50919 WHERE "18-49" = '1.8/6'
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 highest number of viewers for the episode that has an 18-49 of 1.8/6? ### Input: CREATE TABLE table_50919 (
    "Episode" text,
    "Air Date" text,
    "Timeslot" text,
    "18-49" text,
    "Viewers" real
) ### Response: SELECT MAX("Viewers") FROM table_50919 WHERE "18-49" = '1.8/6'