CREATE TABLE table_50527 ("Tournament" CLOB, "Surface" CLOB, "Week" CLOB, "Winner" CLOB, "Finalist" CLOB, "Semifinalists" CLOB)

Who was the winner at the tournament in Hamburg?
SELECT "Winner" FROM table_50527 WHERE "Tournament" = 'hamburg'
SELECT "Winner" FROM "table_50527" WHERE "Tournament" = 'hamburg'