Table:
0
A
B
C
D
E
1
Opposing Team
Against
Date
Venue
Status
2
Japan 'B'
7
10/05/1979
Tokyo
Tour Match
3
Japan
19
13/05/1979
Kintetsu Hanazono Stadium , Osaka
First 'Test'
4
Kyūshū
3
16/05/1979
Fukuoka
Tour Match
5
Japan
18
20/05/1979
Olympic Stadium , Tokyo
Second 'Test'
6
Fiji Juniors
22
25/05/1979
Lautoka
Tour Match
7
Fiji
7
29/05/1979
National Stadium , Suva
'Test' Match
8
Tonga
17
01/06/1979
Teufaiva Sport Stadium , Nuku ʻ alofa
'Test' Match

Questions and formulas:
Question: Which Opposing Team has an Against smaller than 19, and a Date of 20/05/1979?
Formula: LET(query1,LET(query1,FILTER(A1:E1,C1="20/05/1979"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)<19))
Formula2: LET(query1,LET(query1,FILTER(A2:E8,C2:C8="20/05/1979"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)<19))
Level: hard