Table:
0
A
B
C
D
E
1
Name
Wins
Start
Duration
Defeated by
2
Sakumayama
27
2nd day July 2011
6 months 12 days
Senshō
3
Itai
26
1st day November 1978
6 months 10 days
Ōnishiki
4
Tochiazuma II
26
8th day January 1995
7 months 29 days
Dewaarashi
5
Tokitenkū
22
1st day September 2002
6 months 2 days
Furuichi
6
Kototenta
21
1st day January 1986
6 months 0 days
retired

Questions and formulas:
Question: Which Start has a Duration of 6 months 2 days?
Formula: FILTER(C1,D1="6 months 2 days")
Formula2: FILTER(C2:C6,D2:D6="6 months 2 days")
Level: easy
Question: Which duration was defeated by retired?
Formula: FILTER(D1,E1="retired")
Formula2: FILTER(D2:D6,E2:E6="retired")
Level: easy
Question: How many wins, on average, were defeated by furuichi?
Formula: AVERAGE(FILTER(B1,E1="furuichi"))
Formula2: AVERAGE(FILTER(B2:B6,E2:E6="furuichi"))
Level: easy