Table:
0
A
B
C
D
E
1
Year
Grand Slam
Round
Winner
Loser
2
1968
French Open
First round
Nikola Špear
Daniel Contet
3
1987
French Open
Second round
Karel Nováček
Eduardo Bengoechea
4
1987
Wimbledon
First round
Stefan Edberg
Stefan Eriksson
5
1987
US Open
First round
Ivan Lendl
Barry Moir
6
1993
French Open
Second round
Sergi Bruguera
Thierry Champion
7
2011
Davis Cup
Second round
Andy Murray
Laurent Bram

Questions and formulas:
Question: What was the round in 1968?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1=1968),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,A2:A7=1968),3))
Level: medium
Question: What is the round for a year earlier than 1987?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1<1987),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,A2:A7<1987),3))
Level: medium
Question: What is the round when Grand Slam was the Davis Cup?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="davis cup"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="davis cup"),3))
Level: medium
Question: What is the grand slam in 1987, when round shows first round, and Ivan Lendl won?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(A1=1987)*(C1="first round")*(D1="ivan lendl")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(A2:A7=1987)*(C2:C7="first round")*(D2:D7="ivan lendl")),2))
Level: medium