Table:
0
A
B
C
D
E
1
Name
Built
Listed
Location
County
2
Boise River and Canal Bridge
1922
2007-02-07
Caldwell
Canyon
3
Bullion Tunnel
1910
1984-09-20
Avery
Shoshone
4
Capitol Boulevard Memorial Bridge
1931
1990-11-05
Boise
Ada
5
Cold Springs Pegram Truss Railroad Bridge
1894, 1917
1997-07-25
Ketchum
Blaine
6
Conant Creek Pegram Truss Railroad Bridge
1894, 1911, 1916
1997-07-25
Grainville
Fremont
7
Gimlet Pegram Truss Railroad Bridge
1894, 1914
1997-07-25
Ketchum
Blaine
8
Grace Pegram Truss Railroad Bridge
1894, 1913
1997-07-25
Grace
Caribou
9
Ninth Street Bridge
1911
2001-09-14
Boise
Ada
10
North Fork Payette River Bridge
1933
1999-04-02
Smiths Ferry
Valley
11
Owsley Bridge
1921
1998-09-18
Hagerman
Gooding
12
Ririe A Pegram Truss Railroad Bridge
1894, 1914
1997-07-25
Ririe
Jefferson
13
Ririe B Pegram Truss Railroad Bridge
1894, 1914
1997-07-25
Ririe
Jefferson
14
St. Anthony Pegram Truss Railroad Bridge
1896, 1914
1997-07-25
St. Anthony
Fremont
15
Washington Water Power Bridges
1929, 1930
1996-12-20
Post Falls
Kootenai

Questions and formulas:
Question: Who built the conant creek pegram truss railroad bridge?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="conant creek pegram truss railroad bridge"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="conant creek pegram truss railroad bridge"),2))
Level: medium
Question: Where is the historic place that was built in 1910?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="1910"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,B2:B15="1910"),4))
Level: medium
Question: What is the list date of the historic place that was built 1896, 1914?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="1896, 1914"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,B2:B15="1896, 1914"),3))
Level: medium
Question: When was the historic place listed that's in canyon county?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="canyon"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,E2:E15="canyon"),3))
Level: medium