Table:
0
A
B
C
D
E
1
Name
Class
Navy
Date joined
Date departed
2
HMS Bluebell
Flower class corvette
Royal Navy
18 October
21 October
3
HMCS Elk
Armed yacht
Royal Canadian Navy
5 October
7 October
4
HMS Fowey
Shoreham class sloop
Royal Navy
18 October
21 October
5
HMS Heartsease
Flower class corvette
Royal Navy
18 October
21 October
6
HMS Leith
Grimsby class sloop
Royal Navy
18 October
21 October
7
HMS Scarborough
Hastings class sloop
Royal Navy
5 October
21 October

Questions and formulas:
Question: What's the departed date for Grimsby Class Sloop?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="grimsby class sloop"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="grimsby class sloop"),5))
Level: medium
Question: What's the departed date that the HMS Leith of the Royal Navy?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="royal navy")*(A1="hms leith")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(C2:C7="royal navy")*(A2:A7="hms leith")),5))
Level: medium
Question: What's the class of the HMS Fowey?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="hms fowey"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,A2:A7="hms fowey"),2))
Level: medium
Question: What's the class of the HMS Heartsease?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="hms heartsease"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,A2:A7="hms heartsease"),2))
Level: medium