CREATE TABLE table_17163 ("Series" CLOB, "Monday" CLOB, "Tuesday" CLOB, "Wednesday" CLOB, "Thursday" CLOB, "Friday" CLOB, "Saturday" CLOB, "Sunday" CLOB)

Who is the thursday presenter of the show Big Brother 13?
SELECT "Thursday" FROM table_17163 WHERE "Series" = 'Big Brother 13'
SELECT "Thursday" FROM "table_17163" WHERE "Series" = 'Big Brother 13'