Table:
0
A
B
C
D
E
F
G
1
Date Released
Polling institute
Social Democratic
Socialist
Green-Communist
Democratic and Social Centre
Lead
2
October 6, 1991
Election Results
50.6% 135 seats
29.1% 72 seats
8.8% 17 seats
4.4% 5 seats
21.5%
3
October 6, 1991
Exit Poll - RTP1 Universidade Católica
48.0% – 51.9%
28.5% – 31.5%
7.5% – 10.0%
4.5% – 5.5%
19.5% – 20.4%
4
October 6, 1991
Exit Poll - TSF/Expresso Euroexpansão
45.8% – 50.2%
29.8% – 33.9%
6.8% – 9.1%
3.7% – 5.5%
16.0% – 16.3%
5
October 6, 1991
Exit Poll - Antena1 Euroteste
47.0% – 50.0%
31.0% – 34.0%
7.5% – 10.0%
4.0% – 5.0%
16.0%
6
September 28, 1991
Euroteste
47.3%
35.5%
8.5%
4.1%
11.8%
7
September 28, 1991
Euroteste
46.0%
37.0%
9.7%
3.9%
9.0%
8
September 28, 1991
Euroexpansão
44.0%
33.0%
9.0%
6.0%
11.0%
9
September 27, 1991
Marktest
43.1%
32.8%
7.7%
4.6%
10.3%
10
September 27, 1991
Pluriteste
41.2%
34.7%
8.4%
8.1%
6.5%
11
September 20, 1991
Euroteste
45.6%
35.5%
10.0%
4.4%
10.1%
12
September 20, 1991
Marktest
41.9%
31.9%
7.3%
4.4%
10.0%
13
September 16, 1991
Pluriteste
39.2%
26.6%
6.2%
6.0%
12.6%
14
September 16, 1991
Euroteste
45.1%
34.5%
10.2%
5.2%
10.6%
15
September 14, 1991
Norma
45.0%
37.5%
11.2%
3.5%
7.5%
16
August 28, 1991
Euroexpansão/Marktest
35.3%
36.8%
8.7%
4.9%
1.5%
17
August 4, 1991
Euroteste/JN
47.5%
37.8%
12.3%
8.2%
7.7%
18
July 19, 1987
1987 election
50.2% 148 seats
22.2% 60 seats
12.1% 31 seats
4.4% 4 seats
28.0%

Questions and formulas:
Question: What's the date released when there was 9.7% of Green communist?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1="9.7%"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G18,E2:E18="9.7%"),1))
Level: medium
Question: What's the green communist when Euroteste/JN is the polling Institute?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,B1="euroteste/jn"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G18,B2:B18="euroteste/jn"),5))
Level: medium