Table: viola_competition_results
Columns: pmsc_no
year
1st_prize
2nd_prize
3rd_prize

Question: In what year did Kin-fung Leung get 2nd prize?
SQL: SELECT "year" FROM viola_competition_results WHERE "2nd_prize" = 'kin-fung leung'

Question: What is the earliest year in which the 1st price went to Che-Yen (Brian) Chen?
SQL: SELECT MIN("year") FROM viola_competition_results WHERE "1st_prize" = 'che-yen (brian) chen'