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:
| Round | Grand Prix | Date | Location | Pole Position | Fastest Lap | Winning Driver | Winning Constructor | Report |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | United States Grand Prix | 11 March | Phoenix | Gerhard Berger | Gerhard Berger | Ayrton Senna | McLaren - Honda | Report |
| 2.0 | Brazilian Grand Prix | 25 March | Interlagos | Ayrton Senna | Gerhard Berger | Alain Prost | Ferrari | Report |
| 3.0 | San Marino Grand Prix | 13 May | Imola | Ayrton Senna | Alessandro Nannini | Riccardo Patrese | Williams - Renault | Report |
| 4.0 | Monaco Grand Prix | 27 May | Monaco | Ayrton Senna | Ayrton Senna | Ayrton Senna | McLaren - Honda | Report |
| 5.0 | Canadian Grand Prix | 10 June | Circuit Gilles Villeneuve | Ayrton Senna | Gerhard Berger | Ayrton Senna | McLaren - Honda | Report |
| 6.0 | Mexican Grand Prix | 24 June | Hermanos Rodríguez | Gerhard Berger | Alain Prost | Alain Prost | Ferrari | Report |
| 7.0 | French Grand Prix | 8 July | Paul Ricard | Nigel Mansell | Nigel Mansell | Alain Prost | Ferrari | Report |
| 8.0 | British Grand Prix | 15 July | Silverstone | Nigel Mansell | Nigel Mansell | Alain Prost | Ferrari | Report |
| 9.0 | German Grand Prix | 29 July | Hockenheimring | Ayrton Senna | Thierry Boutsen | Ayrton Senna | McLaren - Honda | Report |
| 10.0 | Hungarian Grand Prix | 12 August | Hungaroring | Thierry Boutsen | Riccardo Patrese | Thierry Boutsen | Williams - Renault | Report |
| 11.0 | Belgian Grand Prix | 26 August | Spa-Francorchamps | Ayrton Senna | Alain Prost | Ayrton Senna | McLaren - Honda | Report |
| 12.0 | Italian Grand Prix | 9 September | Monza | Ayrton Senna | Ayrton Senna | Ayrton Senna | McLaren - Honda | Report |
| 13.0 | Portuguese Grand Prix | 23 September | Estoril | Nigel Mansell | Riccardo Patrese | Nigel Mansell | Ferrari | Report |
| 14.0 | Spanish Grand Prix | 30 September | Jerez | Ayrton Senna | Riccardo Patrese | Alain Prost | Ferrari | Report |
| 15.0 | Japanese Grand Prix | 21 October | Suzuka | Ayrton Senna | Riccardo Patrese | Nelson Piquet | Benetton - Ford | Report |
| 16.0 | Australian Grand Prix | 4 November | Adelaide | Ayrton Senna | Nigel Mansell | Nelson Piquet | Benetton - Ford | Report |
Question:
What was the constructor when riccardo patrese was the winning driver?
Answer:
Williams - Renault