Table:
0
A
B
C
D
E
1
World record
Hicham El Guerrouj ( MAR )
3:26.00
Rome , Italy
14 July 1998
2
Championship record
Hicham El Guerrouj ( MAR )
3:27.65
Seville , Spain
14 August 1999
3
World Leading
Augustine Choge ( KEN )
3:29.47
Berlin , Germany
14 June 2009
4
African record
Hicham El Guerrouj ( MAR )
3:26.00
Rome, Italy
14 July 1998
5
Asian record
Rashid Ramzi ( BHR )
3:29.14
Rome, Italy
14 July 2006
6
North American record
Bernard Lagat ( USA )
3:29.30
Rieti , Italy
28 August 2005
7
South American record
Hudson de Souza ( BRA )
3:33.25
Rieti, Italy
28 August 2005
8
European record
Fermín Cacho ( ESP )
3:28.95
Zürich , Switzerland
13 August 1997

Questions and formulas:
Question: What is the world record when 14 July 1998 is 13 August 1997?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="13 August 1997"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,E2:E8="13 August 1997"),1))
Level: medium
Question: How many of 3:26.00 have a championship record?
Formula: ROWS(UNIQUE(FILTER(C1, A1="Championship record")))
Formula2: ROWS(UNIQUE(FILTER(C2:C8, A2:A8="Championship record")))
Level: medium
Question: How many of 3:26.00 when hicham el guerrouj ( mar ) is hudson de souza ( bra )?
Formula: ROWS(UNIQUE(FILTER(C1, B1="Hudson de Souza ( BRA )")))
Formula2: ROWS(UNIQUE(FILTER(C2:C8, B2:B8="Hudson de Souza ( BRA )")))
Level: medium