Table:
0
A
B
C
D
E
1
Year
Entrant
Chassis
Engine
Points
2
1950
Wynn's Friction / Kurtis-Kraft
Kurtis Kraft 1000
Offenhauser L4
9
3
1951
Wynn's Friction Proofing / Walsh
Kurtis Kraft 3000
Offenhauser L4
0
4
1952
Jim Robbins
Kurtis Kraft 1000
Offenhauser L4
0
5
1953
Belond Equa-Flow
Kurtis Kraft 500B
Offenhauser L4
0
6
1954
Belond Equa-Flow / Calif. Muffler
Kurtis Kraft 500C
Offenhauser L4
0
7
1955
Trio Brass Foundry / Anderson
Kurtis Kraft 500C
Offenhauser L4
0
8
1956
J.C. Agajanian
Kuzma Indy Roadster
Offenhauser L4
3
9
1957
Sumar/Chapman Root
Kurtis Kraft 500G
Offenhauser L4
0
10
1958
Fred Gerhardt
Kurtis Kraft 500G
Offenhauser L4
0

Questions and formulas:
Question: Which year is that has a Entrant of belond equa-flow / calif. muffler?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="belond equa-flow / calif. muffler"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,B2:B10="belond equa-flow / calif. muffler"),1))
Level: medium