Table:
0
A
B
C
D
E
F
G
H
1
Grand Prix
Date
Location
Pole Position
Fastest Lap
Winning Driver
Constructor
Report
2
Brazilian Grand Prix
12 April
Jacarepaguá
Nigel Mansell
Nelson Piquet
Alain Prost
McLaren - TAG
Report
3
San Marino Grand Prix
3 May
Imola
Ayrton Senna
Teo Fabi
Nigel Mansell
Williams - Honda
Report
4
Belgian Grand Prix
17 May
Spa-Francorchamps
Nigel Mansell
Alain Prost
Alain Prost
McLaren - TAG
Report
5
Monaco Grand Prix
31 May
Monaco
Nigel Mansell
Ayrton Senna
Ayrton Senna
Lotus - Honda
Report
6
Detroit Grand Prix
21 June
Detroit
Nigel Mansell
Ayrton Senna
Ayrton Senna
Lotus - Honda
Report
7
French Grand Prix
5 July
Paul Ricard
Nigel Mansell
Nelson Piquet
Nigel Mansell
Williams - Honda
Report
8
British Grand Prix
12 July
Silverstone
Nelson Piquet
Nigel Mansell
Nigel Mansell
Williams - Honda
Report
9
German Grand Prix
26 July
Hockenheimring
Nigel Mansell
Nigel Mansell
Nelson Piquet
Williams - Honda
Report
10
Hungarian Grand Prix
9 August
Hungaroring
Nigel Mansell
Nelson Piquet
Nelson Piquet
Williams - Honda
Report
11
Austrian Grand Prix
16 August
Österreichring
Nelson Piquet
Nigel Mansell
Nigel Mansell
Williams - Honda
Report
12
Italian Grand Prix
6 September
Monza
Nelson Piquet
Ayrton Senna
Nelson Piquet
Williams - Honda
Report
13
Portuguese Grand Prix
20 September
Estoril
Gerhard Berger
Gerhard Berger
Alain Prost
McLaren - TAG
Report
14
Spanish Grand Prix
27 September
Jerez
Nelson Piquet
Gerhard Berger
Nigel Mansell
Williams - Honda
Report
15
Mexican Grand Prix
18 October
Hermanos Rodríguez
Nigel Mansell
Nelson Piquet
Nigel Mansell
Williams - Honda
Report
16
Japanese Grand Prix
1 November
Suzuka
Gerhard Berger
Alain Prost
Gerhard Berger
Ferrari
Report
17
Australian Grand Prix
15 November
Adelaide
Gerhard Berger
Gerhard Berger
Gerhard Berger
Ferrari
Report

Questions and formulas:
Question: When was the Austrian Grand Prix?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,A1="austrian grand prix"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H17,A2:A17="austrian grand prix"),2))
Level: medium