CREATE TABLE table_11906 ("Week" TEXT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Kickoff [a ]" TEXT, "Game site" TEXT, "Attendance" TEXT, "Record" TEXT)

When the result was l 13-7 ot, who was the opponent?
SELECT "Opponent" FROM table_11906 WHERE "Result" = 'l 13-7 ot'
SELECT "Opponent" FROM "table_11906" WHERE "Result" = 'l 13-7 ot'