CREATE TABLE table_203_397 (id NUMBER, "series" CLOB, "launch date" CLOB, "finale date" CLOB, "days" NUMBER, "housemates" NUMBER, "winner" CLOB, "main presenter" CLOB, "grand prize" CLOB, "liveshow\ audience\ millions" NUMBER)

total number of seasons presented by alessia marcuzzi :
SELECT COUNT("series") FROM table_203_397 WHERE "main presenter" = 'alessia marcuzzi'
SELECT COUNT("series") FROM "table_203_397" WHERE "main presenter" = 'alessia marcuzzi'