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:
| Grand Prix | Date | Location | Pole Position | Fastest Lap | Winning Driver | Constructor | Report |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Brazilian Grand Prix | 12 April | Jacarepaguá | Nigel Mansell | Nelson Piquet | Alain Prost | McLaren - TAG | Report |
| San Marino Grand Prix | 3 May | Imola | Ayrton Senna | Teo Fabi | Nigel Mansell | Williams - Honda | Report |
| Belgian Grand Prix | 17 May | Spa-Francorchamps | Nigel Mansell | Alain Prost | Alain Prost | McLaren - TAG | Report |
| Monaco Grand Prix | 31 May | Monaco | Nigel Mansell | Ayrton Senna | Ayrton Senna | Lotus - Honda | Report |
| Detroit Grand Prix | 21 June | Detroit | Nigel Mansell | Ayrton Senna | Ayrton Senna | Lotus - Honda | Report |
| French Grand Prix | 5 July | Paul Ricard | Nigel Mansell | Nelson Piquet | Nigel Mansell | Williams - Honda | Report |
| British Grand Prix | 12 July | Silverstone | Nelson Piquet | Nigel Mansell | Nigel Mansell | Williams - Honda | Report |
| German Grand Prix | 26 July | Hockenheimring | Nigel Mansell | Nigel Mansell | Nelson Piquet | Williams - Honda | Report |
| Hungarian Grand Prix | 9 August | Hungaroring | Nigel Mansell | Nelson Piquet | Nelson Piquet | Williams - Honda | Report |
| Austrian Grand Prix | 16 August | Österreichring | Nelson Piquet | Nigel Mansell | Nigel Mansell | Williams - Honda | Report |
| Italian Grand Prix | 6 September | Monza | Nelson Piquet | Ayrton Senna | Nelson Piquet | Williams - Honda | Report |
| Portuguese Grand Prix | 20 September | Estoril | Gerhard Berger | Gerhard Berger | Alain Prost | McLaren - TAG | Report |
| Spanish Grand Prix | 27 September | Jerez | Nelson Piquet | Gerhard Berger | Nigel Mansell | Williams - Honda | Report |
| Mexican Grand Prix | 18 October | Hermanos Rodríguez | Nigel Mansell | Nelson Piquet | Nigel Mansell | Williams - Honda | Report |
| Japanese Grand Prix | 1 November | Suzuka | Gerhard Berger | Alain Prost | Gerhard Berger | Ferrari | Report |
| Australian Grand Prix | 15 November | Adelaide | Gerhard Berger | Gerhard Berger | Gerhard Berger | Ferrari | Report |
Question:
When was the Austrian Grand Prix?
Answer:
16 August