CREATE TABLE "pivc_pmsc_laureates" (
  "pmsc_no" text,
  "year" real,
  "1st_prize" text,
  "2nd_prize" text,
  "3rd_prize" text
);

Question: In what year did Kin-fung Leung get 2nd prize?
SQL: SELECT "year" FROM "pivc_pmsc_laureates" 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 "pivc_pmsc_laureates" WHERE "1st_prize"='che-yen (brian) chen';