Table:
0
A
B
C
D
E
1
Year
Location
Gold
Silver
Bronze
2
1990
Beijing
Chen Sitan
Wang Zengxiang
Nobutsugu Arai
3
1994
Hiroshima
Masaru Masuda
Chan Ming Shu
Han Gyeong Su Daniel Go
4
1998
Bangkok
Chan Ming Shu
Toshiya Watanabe
Nguyen Anh Minh
5
2002
Busan
Yang Seong Chan
Chan Ming Shu
Bobby Co
6
2006
Doha
Wu Yanan
Hei Zhi Hong
Goh Qiu Bin
7
2010
Guangzhou
Wu Yanan
Nguyen Thanh Tung
Hsiao Yung-jih

Questions and formulas:
Question: Who won silver in the year before 2010, the year Chan Ming Shu won gold?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(A1<2010)*(C1="chan ming shu")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(A2:A7<2010)*(C2:C7="chan ming shu")),4))
Level: medium
Question: What is the location for the year under 2010 and the year Hei Zhi Hong won silver?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(A1<2010)*(D1="hei zhi hong")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(A2:A7<2010)*(D2:D7="hei zhi hong")),2))
Level: medium
Question: Which location had a year over 2006?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1>2006),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,A2:A7>2006),2))
Level: medium