CREATE TABLE table_28190363_1 (presenter_s_ VARCHAR2, name VARCHAR2)

How many sets of presenters are there for the version of the show named Celebrity Masterchef?
SELECT COUNT(presenter_s_) FROM table_28190363_1 WHERE name = "Celebrity MasterChef"
SELECT COUNT("presenter_s_") FROM "table_28190363_1" WHERE "Celebrity MasterChef" = "name"