you are likely to find Patron in/at/on Restaurant. you are likely to find Toilet in/at/on Restaurant. you are likely to find Toilet in/at/on Bathroom. you are likely to find Water in/at/on Bathroom. 
Educator is derived from Educate. Educator is a type of Professional. Critic is a type of Professional. 
Patron --AtLocation--> Restaurant <--AtLocation-- Toilet --AtLocation--> Bathroom <--AtLocation-- Water 
Educate <--DerivedFrom-- Educator --IsA--> Professional <--IsA-- Critic 