Table:
0
A
B
C
D
E
F
G
1
Name
Pennant
Builder
Laid Down
Launched
Commissioned
Fate
2
Chaplet
R52
Thornycroft , Woolston
29 April 1943
18 July 1944
24 August 1945
Sold for scrapping 1965
3
Chequers *
R61
Scotts, Greenock
4 May 1943
30 October 1944
28 September 1945
Sold for scrapping 1966
4
Chieftain
R36
Scotts, Greenock
27 June 1943
26 February 1945
7 March 1946
Sold for scrapping 1961
5
Chevron
R51
Alex. Stephen , Linthouse
18 March 1943
23 February 1944
23 August 1945
Sold for scrapping 1969
6
Cheviot
R90
Alex. Stephen, Linthouse
27 April 1943
2 May 1944
11 December 1945
Sold for scrapping 1966

Questions and formulas:
Question: What are the commissioned for scotts, greenock and chieftain?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,(C1="Scotts, Greenock")*(A1="Chieftain")),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G6,(C2:C6="Scotts, Greenock")*(A2:A6="Chieftain")),6))
Level: medium
Question: What is the builder launched 30 october 1944?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1="30 October 1944"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G6,E2:E6="30 October 1944"),3))
Level: medium