Table:
0
A
B
C
D
E
1
Order
Title
Story timeline
Published
In order of publication
2
1
Burr
1775–1808, 1833–1836, 1840
1973
Second
3
2
Lincoln
1861–1865
1984
Fourth
4
3
1876
1875–1877
1976
Third
5
4
Empire
1898–1907
1987
Fifth
6
5
Hollywood
1917–1923
1990
Sixth
7
6
Washington, D.C.
1937–1952
1967
First
8
7
The Golden Age
1939–1954, 2000
2000
Seventh

Questions and formulas:
Question: What is the story timeline that was published first prior to 1984?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1<1984)*(E1="first")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(D2:D8<1984)*(E2:E8="first")),3))
Level: medium
Question: How many total publications were the first of the series?
Formula: ROWS(UNIQUE(FILTER(D1, E1="first")))
Formula2: ROWS(UNIQUE(FILTER(D2:D8, E2:E8="first")))
Level: medium