Table:
0
A
B
C
D
E
F
G
H
1
Unit
Type
Net power
Total power
Construction start
Construction finish
Commercial operation
Shut down
2
Chinon A1
Magnox-Reactor
70 MW
80 MW
01.02.1957
14.06.1963
01.02.1964
16.04.1973
3
Chinon A2
Magnox-Reactor
210 MW
230 MW
01.08.1959
24.02.1965
24.02.1965
14.06.1985
4
Chinon A3
Magnox-Reactor
480 MW
480 MW
01.03.1961
04.08.1966
04.08.1966
15.06.1990
5
Chinon B1
PWR
905 MW
954 MW
01.03.1977
30.11.1982
01.02.1984
Qualified to operate until 2024
6
Chinon B2
PWR
905 MW
954 MW
01.03.1977
29.11.1983
01.08.1984
Qualified to operate until 2024
7
Chinon B3
PWR
905 MW
954 MW
01.10.1980
20.10.1986
04.03.1987
Qualified to operate until 2027

Questions and formulas:
Question: When did the construction of the unit Chinon B1 with net power of 905 MW start?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,(C1="905 MW")*(A1="Chinon B1")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H7,(C2:C7="905 MW")*(A2:A7="Chinon B1")),5))
Level: medium
Question: What's the total power of the unit whose construction finished on 14.06.1963?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,F1="14.06.1963"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H7,F2:F7="14.06.1963"),4))
Level: medium
Question: How many different values of total power are there for the unit whose construction started on 01.03.1977 and whose commercial operation started on 01.02.1984?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,(E1="01.03.1977")*(G1="01.02.1984")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H7,(E2:E7="01.03.1977")*(G2:G7="01.02.1984")),4))
Level: medium
Question: What's the shut down state of the unit that's been in commercial operation since 01.02.1984?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,G1="01.02.1984"),8))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H7,G2:G7="01.02.1984"),8))
Level: medium
Question: When was the start of the construction of the unit that's been in commercial operation since 04.03.1987?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:H1,G1="04.03.1987"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:H7,G2:G7="04.03.1987"),5))
Level: medium