What is Tournament, when Result is 18th?
CREATE TABLE table_49800 (
    "Year" real,
    "Tournament" text,
    "Venue" text,
    "Result" text,
    "Extra" text
)
SELECT "Tournament" FROM table_49800 WHERE "Result" = '18th'
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 Tournament, when Result is 18th? ### Input: CREATE TABLE table_49800 (
    "Year" real,
    "Tournament" text,
    "Venue" text,
    "Result" text,
    "Extra" text
) ### Response: SELECT "Tournament" FROM table_49800 WHERE "Result" = '18th'