CREATE TABLE table_39207 ("Isotope" CLOB, "Half-life" CLOB, "Decay mode" CLOB, "Discovery year" CLOB, "Reaction" CLOB)

What is the half-life discovered in 2003?
SELECT "Half-life" FROM table_39207 WHERE "Discovery year" = '2003'
SELECT "Half-life" FROM "table_39207" WHERE "Discovery year" = '2003'