Table:
0
A
B
C
D
E
1
Date
Time ( GMT )
Serial
Apogee
Outcome
2
1958-07-19
17:36
3B
kilometres (mi)
Failure.[ citation needed ]
3
1958-08-02
22:16
4B
kilometres (mi)
Success
4
1958-08-29
04:30
5B
kilometres (mi)
Success
5
1958-09-14
05:24
8B
kilometres (mi)
Success
6
1958-09-18
21:27
6B
kilometres (mi)
Failure.
7
1958-11-18
04:00
9B
kilometres (mi)
Partial failure.
8
1958-11-29
02:27
12B
kilometres (mi)
Success
9
1958-12-18
22:02
10B
N/A
Success
10
1959-01-16
04:00
13B
kilometres (mi)
Failure.
11
1959-02-04
08:01
11B
kilometres (mi)
Success[ citation needed ]

Questions and formulas:
Question: What is the date for the 10b serial?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="10b"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,C2:C11="10b"),1))
Level: medium