what date is the opponent is chicago bears?
CREATE TABLE table_1507 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Game site" text,
    "Record" text,
    "Attendance" real
)
SELECT "Date" FROM table_1507 WHERE "Opponent" = 'Chicago Bears'
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 date is the opponent is chicago bears? ### Input: CREATE TABLE table_1507 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Game site" text,
    "Record" text,
    "Attendance" real
) ### Response: SELECT "Date" FROM table_1507 WHERE "Opponent" = 'Chicago Bears'