Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
In what Week were there more than 23,875 in Attendance at Memorial Stadium with Detroit Lions as the Opponent?

### Inputs:
table_name: table, columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']

### Response:
SELECT AVG Week FROM table WHERE Attendance > 23,875 AND Game Site = memorial stadium AND Opponent = detroit lions