Table:
0
A
B
C
D
E
1
Year
League
Reg. Season
Playoffs
Lost
2
1989/90
National Conference
4th, Eastern
Did not qualify
38
3
1990/91
National Conference
4th, Eastern
Did not qualify
33
4
1991/92
American Conference
4th, Eastern
Did not qualify
38
5
1992/93
American Conference
3rd, Eastern
Did not qualify
35
6
1993/94
American Conference
4th, Eastern
Did not qualify
38
7
1996/97
American Conference
4th, Eastern
Did not qualify
27
8
1997/98
American Conference
3rd, Eastern
Qualified
22
9
1998/99
American Conference
2nd, Eastern
Qualified
15

Questions and formulas:
Question: What is the League with a Year that is 1990/91?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="1990/91"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,A2:A9="1990/91"),2))
Level: medium