Table:
0
A
B
C
D
E
F
G
H
I
1
ILO code
Field
conclusion date
entry into force
closure for signature
Parties (April 2011)
Denunciations (September 2011)
revising convention(s)
text and ratifications
2
C5
Industry
28 November 1919
13 June 1921
N.A.
2
70
C59, this convention
Text, ratifications
3
C7
Sea
7 July 1920
27 September 1921
N.A.
3
50
C58, this convention, MLC
Text, ratifications
4
C10
Agriculture
16 November 1921
31 August 1923
N.A.
4
51
this convention
Text, ratifications
5
C15
trimmers and stokers
11 November 1921
20 November 1922
N.A.
9
60
this convention
Text, ratifications
6
C33
Non-Industrial Employment (revised)
30 April 1932
6 June 1935
29 December 1950
2
23
C60, this convention
Text, ratifications
7
C58
Sea (revised)
24 October 1936
11 April 1939
N.A.
15
36
this convention, MLC
Text, ratifications
8
C59
Industry (revised)
22 June 1937
21 February 1941
19 June 1976
9
27
this convention
Text, ratifications
9
C60
Non-Industrial Employment
22 June 1937
29 December 1950
N.A.
0
11
this convention
Text, ratifications
10
C112
Fishermen
19 June 1959
7 November 1961
N.A.
8
21
this convention, Work in Fishing Convention
Text, ratifications

Questions and formulas:
Question: What were the revising conventions commentary with a denunciation of 21?
Formula: LET(query1,SUMMARIZE(H1,SUMX(G1)),FILTER(query1,CHOOSECOLS(query1,2)=21))
Formula2: LET(query1,SUMMARIZE(H2:H10,SUMX(G2:G10)),FILTER(query1,CHOOSECOLS(query1,2)=21))
Level: hard
Question: How many inputs are there in the 'closure for signature' tab under the field 'sea (revised)'?
Formula: ROWS(UNIQUE(FILTER(E1, B1="Sea (revised)")))
Formula2: ROWS(UNIQUE(FILTER(E2:E10, B2:B10="Sea (revised)")))
Level: medium
Question: How many ILO codes are there with revising conventions of 'this convention, work in fishing convention'?
Formula: ROWS(UNIQUE(FILTER(A1, H1="this convention, Work in Fishing Convention")))
Formula2: ROWS(UNIQUE(FILTER(A2:A10, H2:H10="this convention, Work in Fishing Convention")))
Level: medium
Question: What  was the revising convention of the field 'trimmers and stokers'?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:I1,B1="trimmers and stokers"),8))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:I10,B2:B10="trimmers and stokers"),8))
Level: medium