Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Rnd | Race | Date | Location | Pole Position | Fastest Lap | Race Winner | Constructor | Report |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Argentine Grand Prix | 9 January | Buenos Aires | James Hunt | James Hunt | Jody Scheckter | Wolf - Ford | Report |
| 2.0 | Brazilian Grand Prix | 23 January | Interlagos | James Hunt | James Hunt | Carlos Reutemann | Ferrari | Report |
| 3.0 | South African Grand Prix | 5 March | Kyalami | James Hunt | John Watson | Niki Lauda | Ferrari | Report |
| 4.0 | United States Grand Prix West | 3 April | Long Beach | Niki Lauda | Niki Lauda | Mario Andretti | Lotus - Ford | Report |
| 5.0 | Spanish Grand Prix | 8 May | Jarama | Mario Andretti | Jacques Laffite | Mario Andretti | Lotus - Ford | Report |
| 6.0 | Monaco Grand Prix | 22 May | Monaco | John Watson | Jody Scheckter | Jody Scheckter | Wolf - Ford | Report |
| 7.0 | Belgian Grand Prix | 5 June | Zolder | Mario Andretti | Gunnar Nilsson | Gunnar Nilsson | Lotus - Ford | Report |
| 8.0 | Swedish Grand Prix | 19 June | Anderstorp | Mario Andretti | Mario Andretti | Jacques Laffite | Ligier - Matra | Report |
| 9.0 | French Grand Prix | 3 July | Dijon-Prenois | Mario Andretti | Mario Andretti | Mario Andretti | Lotus - Ford | Report |
| 10.0 | British Grand Prix | 16 July | Silverstone | James Hunt | James Hunt | James Hunt | McLaren - Ford | Report |
| 11.0 | German Grand Prix | 31 July | Hockenheimring | Jody Scheckter | Niki Lauda | Niki Lauda | Ferrari | Report |
| 12.0 | Austrian Grand Prix | 14 August | Österreichring | Niki Lauda | John Watson | Alan Jones | Shadow - Ford | Report |
| 13.0 | Dutch Grand Prix | 28 August | Zandvoort | Mario Andretti | Niki Lauda | Niki Lauda | Ferrari | Report |
| 14.0 | Italian Grand Prix | 11 September | Monza | James Hunt | Mario Andretti | Mario Andretti | Lotus - Ford | Report |
| 15.0 | United States Grand Prix | 2 October | Watkins Glen | James Hunt | Ronnie Peterson | James Hunt | McLaren - Ford | Report |
| 16.0 | Canadian Grand Prix | 9 October | Mosport | Mario Andretti | Mario Andretti | Jody Scheckter | Wolf - Ford | Report |
Question:
What was the constructor for round 15?
Answer:
McLaren - Ford