Table:
0
A
B
C
D
E
1
Ships name
Date entered service
Date withdrawn
Tonnage
Type of Ship
2
Oranje Nassau
27 August 1945
July 1954
3053
Twin Screw Steamer
3
Mecklenburg
21 November 1945
25 October 1959
2907
Twin Screw Steamer
4
Koningin Emma
5 March 1948
December 1968
4353
Twin Screw Motorship
5
Prinses Beatrix
31 May 1948
September 1968
4353
Twin Screw Motorship
6
Koningin Wilhelmina
7 February 1960
1 July 1978
6228
Twin Screw Motorship
7
Koningin Juliana
17 October 1968
8 April 1984
6682
Twin Screw Ro-Ro Motorship
8
Prinses Beatrix
29 June 1978
May 1986
9356
Twin Screw Ro-Ro Motorship
9
Prins Oberon
11 February 1983
11 March 1983
7993
Twin Screw Ro-Ro Motorship
10
Zeeland
1 April 1984
25 March 1986
6801
Twin Screw Ro-Ro Motorship
11
Armorique
25 March 1986
16 April 1986
5731
Twin Screw Ro-Ro Motorship
12
Koningin Beatrix
16 April 1986
2 June 1997
31189
Twin Screw Ro-Ro Motorship

Questions and formulas:
Question:  what's the date entered service with ships name koningin wilhelmina
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Koningin Wilhelmina"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,A2:A12="Koningin Wilhelmina"),2))
Level: medium
Question:  what's the date where ships name is zeeland entered service
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Zeeland"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,A2:A12="Zeeland"),2))
Level: medium
Question: what is the maximum tonnage where date entered service is 25 march 1986 
Formula: MAXIFS(D1,B1,"25 March 1986")
Formula2: MAXIFS(D2:D12,B2:B12,"25 March 1986")
Level: easy
Question: what are all the date withdrawn for service entered on 21 november 1945
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="21 November 1945"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,B2:B12="21 November 1945"),3))
Level: medium
Question: what are all the date withdrawn for twin screw ro-ro motorship
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="Twin Screw Ro-Ro Motorship"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,E2:E12="Twin Screw Ro-Ro Motorship"),3))
Level: medium
Question: what are all the date withdrawn for koningin beatrix
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Koningin Beatrix"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,A2:A12="Koningin Beatrix"),3))
Level: medium