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:
| Race | Circuit | Date | Pole position | Fastest lap | Winning driver | Constructor | Tyre | Report |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Dutch Grand Prix | Zandvoort | 20 May | John Surtees | Bruce McLaren | Graham Hill | BRM | D | Report |
| Monaco Grand Prix | Monaco | 3 June | Jim Clark | Jim Clark | Bruce McLaren | Cooper - Climax | D | Report |
| Belgian Grand Prix | Spa-Francorchamps | 17 June | Graham Hill | Jim Clark | Jim Clark | Lotus - Climax | D | Report |
| French Grand Prix | Rouen-Les-Essarts | 8 July | Jim Clark | Graham Hill | Dan Gurney | Porsche | D | Report |
| British Grand Prix | Aintree | 21 July | Jim Clark | Jim Clark | Jim Clark | Lotus - Climax | D | Report |
| German Grand Prix | Nürburgring | 5 August | Dan Gurney | Graham Hill | Graham Hill | BRM | D | Report |
| Italian Grand Prix | Monza | 16 September | Jim Clark | Graham Hill | Graham Hill | BRM | D | Report |
| United States Grand Prix | Watkins Glen | 7 October | Jim Clark | Jim Clark | Jim Clark | Lotus - Climax | D | Report |
| South African Grand Prix | Prince George | 29 December | Jim Clark | Jim Clark | Graham Hill | BRM | D | Report |
Question:
What is the constructor at the United States Grand Prix?
Answer:
Lotus - Climax