Table:
0
A
B
C
D
E
1
Race
Length
Class
Circuit
Date
2
Rolex 24 at Daytona
24 Hours
All
Daytona International Speedway
February 3 February 4
3
Exxon Superflo 12 Hours of Sebring
12 Hours
All
Sebring International Raceway
March 17
4
Advance Auto Parts Grand Prix of Atlanta
40 Minutes
GTS-2
Road Atlanta
April 21
5
Advance Auto Parts Grand Prix of Atlanta
3 Hours
WSC/GTS-1
Road Atlanta
April 21
6
Exxon Superflo 500 at Texas
500 Miles
All
Texas World Speedway
May 5
7
The Dodge Dealers Grand Prix
1 Hour
GTS-2
Lime Rock Park
May 27
8
The Dodge Dealers Grand Prix
1 Hour 45 Minutes
WSC/GTS-1
Lime Rock Park
May 27
9
First Union Six Hours at the Glen
Six Hours
All
Watkins Glen International
June 9
10
Toshiba California Grand Prix
45 Minutes
GTS-2
Sears Point Raceway
July 14
11
Toshiba California Grand Prix
3 Hours
WSC/GTS-1
Sears Point Raceway
July 14
12
Chrysler Mosport 500
3 Hours
All
Mosport International Raceway
August 25
13
Sprint Grand Prix of Dallas
45 Minutes
GTS-2
Dallas street circuit
September 1
14
Sprint Grand Prix of Dallas
2 Hours
WSC/GTS-1
Dallas street circuit
September 1
15
Daytona IMSA Finale
3 Hours
All
Daytona International Speedway
October 6

Questions and formulas:
Question: On what circuit is there a class gts-2 race that takes place on May 27?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(E1="may 27")*(C1="gts-2")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,(E2:E15="may 27")*(C2:C15="gts-2")),4))
Level: medium
Question: On what circuit is there a race that lasts 2 hours?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="2 hours"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,B2:B15="2 hours"),4))
Level: medium
Question: What class is the dodge dealers grand prix?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="the dodge dealers grand prix"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="the dodge dealers grand prix"),3))
Level: medium
Question: What is the length of the First Union six hours at the Glen?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="first union six hours at the glen"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="first union six hours at the glen"),2))
Level: medium
Question: What is the class of the race that takes place on August 25?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="august 25"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,E2:E15="august 25"),3))
Level: medium