Table:
0
A
B
C
D
E
1
Class
Wheels
Date
Builder
No. Built
2
G
4-4-0
1900
Neilson
5
3
C
0-6-0
1900-4
SECR Ashford (70)
109
4
C
0-6-0
1901-4
LCDR Longhedge (9)
109
5
C
0-6-0
1900
Neilson (15)
109
6
C
0-6-0
1900
Sharp Stewart (15)
109
7
R1
0-4-4T
1900
Sharp Stewart
15
8
H
0-4-4T
1904-15
SECR Ashford
66
9
D
4-4-0
1901
Sharp Stewart (10)
51
10
D
4-4-0
1903
Stephenson (5)
51
11
D
4-4-0
1903
Vulcan Foundry (5)
51
12
D
4-4-0
1903
Dübs (10)
51
13
D
4-4-0
1901-7
SECR Ashford (21)
51
14
Terrier
0-6-0T
1875
LBSCR Brighton
50
15
E
4-4-0
1905-10
SECR Ashford
26
16
P
0-6-0T
1909-10
SECR Ashford
8
17
J
0-6-4T
1913
SECR Ashford
5
18
L
4-4-0
1914
Borsig (10)
22
19
L
4-4-0
1914
Beyer-Peacock (12)
22

Questions and formulas:
Question: Which Builder has a Class of Terrier?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="terrier"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E19,A2:A19="terrier"),4))
Level: medium