CREATE TABLE table_20947 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Bills points" FLOAT, "Opponents" FLOAT, "Bills first downs" FLOAT, "Record" TEXT, "Attendance" FLOAT)

How many opponents did the team play in week 13?
SELECT COUNT("Opponents") FROM table_20947 WHERE "Game" = '13'
SELECT COUNT("Opponents") FROM "table_20947" WHERE "Game" = '13'