Table:
0
A
B
C
D
E
1
Name of System
Location
Traction Type
Date (From)
Date (To)
2
Calgary Municipal Railway
Calgary
Electric
5 Jul 1909 25 May 1981
29 Dec 1950 -
3
Edmonton Radial Railway
Edmonton
Electric
30 Oct 1908 22 Apr 1978
1 Sep 1951 -
4
Edmonton Radial Railway
Edmonton
Petrol (gasoline)
30 Sep 1913
1 Apr 1914
5
Lake Louise Tramway
Lake Louise
Petrol (gasoline)
1912
1930
6
Lethbridge Municipal Railway
Lethbridge
Electric
Sep 1912
8 Sep 1947

Questions and formulas:
Question: what is the date for traction type electric with calgary location?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="electric")*(B1="calgary")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,(C2:C6="electric")*(B2:B6="calgary")),4))
Level: medium
Question: Which date has date started from 30 Sep 1913?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="30 sep 1913"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,D2:D6="30 sep 1913"),5))
Level: medium