On what date was the attendance of the crowd 78,431?
CREATE TABLE table_52231 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" text
)
SELECT "Date" FROM table_52231 WHERE "Attendance" = '78,431'
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: On what date was the attendance of the crowd 78,431? ### Input: CREATE TABLE table_52231 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" text
) ### Response: SELECT "Date" FROM table_52231 WHERE "Attendance" = '78,431'