CREATE TABLE table_16159 ("Region/country" CLOB, "Local title" CLOB, "Network" CLOB, "Winners" CLOB, "Main presenters" CLOB)

What is the main presenter of bulgaria?
SELECT "Main presenters" FROM table_16159 WHERE "Region/country" = 'Bulgaria'
SELECT "Main presenters" FROM "table_16159" WHERE "Region/country" = 'Bulgaria'