When did the Chargers play the Denver Broncos before Week 10?
CREATE TABLE table_7587 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" real
)
SELECT "Date" FROM table_7587 WHERE "Week" < '10' AND "Opponent" = 'denver broncos'
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: When did the Chargers play the Denver Broncos before Week 10? ### Input: CREATE TABLE table_7587 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" real
) ### Response: SELECT "Date" FROM table_7587 WHERE "Week" < '10' AND "Opponent" = 'denver broncos'