Table:
text: 1987 Formula One season
Season review
Season review
Grand_Prix Date_ Location_ Pole_Position Fastest_Lap Winning_Driver Constructor_ 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

Question: When was the 1987 Austrian Grand Prix Formula 1 season?