The only item you are allowed to carry in is a transparent bag containing coins for the vending machines to purchase food items in the visitors room .
(you; are allowed; ) (the vending machines; to purchase; food items; L:in the visitors room) (The only item; to carry in; you) (The only item you are allowed to carry in; is; a transparent bag containing coins) (a transparent bag; containing; coins for the vending machines to purchase food items in the visitors room)
you the vending machines The only item The only item you are allowed to carry in a transparent bag
are allowed to purchase to carry in is containing
food items L:in the visitors room
you
a transparent bag containing coins
coins for the vending machines to purchase food items in the visitors room