Table:
0
A
B
C
D
E
F
G
1
Ballpark
Location
Team
Opened
Closed
Demod
Current Status
2
Arlington Stadium
Arlington, Texas
Rangers
1965
1993
1994
Now parking for Rangers Ballpark in Arlington .
3
Jarry Park Stadium
Montreal, Quebec
Expos
1969
1976
1993
Converted to Stade Uniprix , a tennis venue.
4
Kansas City Municipal Stadium
Kansas City, Missouri
Athletics Royals
1923
1972
1976
Now a municipal garden.
5
Memorial Stadium
Baltimore, Maryland
Orioles
1950
1997
2001
Now residential.
6
Metropolitan Stadium
Bloomington, Minnesota
Twins
1956
1981
1985
Now site of the Mall of America .
7
Seals Stadium
San Francisco, California
Giants
1931
1959
1959
Now a shopping center.
8
Sick's Stadium
Seattle, Washington
Pilots
1938
1976
1979
Now a Lowe's store.

Questions and formulas:
Question: Where is the ballpark of the Twins?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,C1="Twins"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G8,C2:C8="Twins"),2))
Level: medium
Question: How many locations have been used for ballparks named Memorial Stadium?
Formula: ROWS(UNIQUE(FILTER(B1, A1="Memorial Stadium")))
Formula2: ROWS(UNIQUE(FILTER(B2:B8, A2:A8="Memorial Stadium")))
Level: medium
Question: When was the park demolished in 1994 closed?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,F1=1994),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G8,F2:F8=1994),5))
Level: medium