CREATE TABLE table_19283 ("Series" CLOB, "Main presenter" CLOB, "Co-presenter" CLOB, "Comedian" CLOB, "UK co-presenter" CLOB)

What series have Caroline Flack as a main presenter?
SELECT "Series" FROM table_19283 WHERE "Main presenter" = 'Caroline Flack'
SELECT "Series" FROM "table_19283" WHERE "Main presenter" = 'Caroline Flack'