Table:
0
A
B
C
D
E
1
Year
Performance
World Ranking
Venue
Date
2
1979
8.22.72
3
Turin
Jun 9
3
1980
8.12.5
4
Rome
Aug 5
4
1981
8.13.32
1
Zagreb
Aug 16
5
1982
8.22.34
14
Berlin
Aug 20
6
1983
8.21.17
19
Helsinki
Aug 12

Questions and formulas:
Question: How many world rankings are after Aug 5, 1980 ?
Formula: SUM(FILTER(C1, (E1="aug 5")*(A1>1980)))
Formula2: SUM(FILTER(C2:C6, (E2:E6="aug 5")*(A2:A6>1980)))
Level: easy
Question: On which date is there a performance of more than 8.22.72?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="8.22.72"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="8.22.72"),5))
Level: medium
Question: The venue of Rome has which date?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="rome"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,D2:D6="rome"),5))
Level: medium