Table:
0
A
B
C
D
E
F
1
Volume
Discs
Episodes
Region 1 release
Region 2 release
Region 4 release
2
1
1
5
January 23, 2007
Not released
June 4, 2009
3
2
1
5
April 10, 2007
Not released
August 6, 2009
4
3
1
5
May 22, 2007
Not released
October 29, 2009
5
4
1
5
August 14, 2007
Not released
March 31, 2010
6
Box set
4
20
September 11, 2007
July 20, 2009
September 9, 2010

Questions and formulas:
Question: What is the region 4 release that has july 20, 2009 as the region 2?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="july 20, 2009"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,E2:E6="july 20, 2009"),6))
Level: medium
Question: What is the region 1 release that has july 20, 2009 as the region 2?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="july 20, 2009"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,E2:E6="july 20, 2009"),4))
Level: medium
Question: What is the average episode that has September 11, 2007 as a region 1?
Formula: AVERAGEIFS(C1,D1,"september 11, 2007")
Formula2: AVERAGEIFS(C2:C6,D2:D6,"september 11, 2007")
Level: easy