Table:
0
A
B
C
D
E
F
G
1
No.
Summoned
Elected
Assembled
Dissolved
1st member
2nd member
2
1st
23 May 1461
1461
4 November 1461
6 May 1462
unknown
unknown
3
2nd
22 December 1462
1462/63
29 April 1463
28 March 1465
unknown
unknown
4
3rd
28 February 1467
1467
3 June 1467
7 June 1468
John Boston
William Colet , jnr.
5
4th
19 August 1472
1472
6 October 1472
14 March 1475
John Boston
Thomas Adams
6
5th
20 November 1477
1477/78
16 January 1478
26 February 1478
William Colet
Thomas Adams

Questions and formulas:
Question: When 1462/63 was the elected what was the no.?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,C1="1462/63"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G6,C2:C6="1462/63"),1))
Level: medium
Question: When 1472 was the elected when was the assembled?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,C1="1472"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G6,C2:C6="1472"),4))
Level: medium