Table:
0
A
B
C
D
E
F
1
Co-king
Relationship to Monarch
Crowned
Co-kingship ceased
Reason
Monarch
2
Robert (II)
son
30 December 987
24 October 996
became sole king
Hugh Capet
3
Hugh Magnus
son
19 June 1017
17 September 1025
died
Robert II of France
4
Henry (I)
son
14 May 1027
20 July 1031
became sole king
Robert II of France
5
Philip (I)
son
23 May 1059
4 August 1060
became sole king
Henry I of France
6
Philip
son
14 April 1129
13 October 1131
died
Louis VI of France
7
Louis (VII)
son
25 October 1131
1 August 1137
became sole king
Louis VI of France

Questions and formulas:
Question: Name the crownded for 17 september 1025
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="17 September 1025"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,D2:D7="17 September 1025"),3))
Level: medium
Question: Name the total number of monarchs for 23 may 1059 crowned
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="23 May 1059"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,C2:C7="23 May 1059"),6))
Level: medium
Question: Name the reason for 20 july 1031
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="20 July 1031"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,D2:D7="20 July 1031"),5))
Level: medium
Question: Name the monarch for 13 october 1131
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="13 October 1131"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,D2:D7="13 October 1131"),6))
Level: medium