user: Question: Against what team did the Islanders have a 5-18-5 record?
Columns: ['Game', 'December', 'Opponent', 'Score', 'Location/Attendance', 'Record', 'Points']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [23.0, 2.0, 'New York Rangers', '6-5', 'Nassau Veterans Memorial Coliseum (13,742)', '5-13-5', 15.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Record" = '5-18-5';