you are likely to find Scientist in/at/on Laboratory. Laboratory is a type of Workplace. Lab is a type of Workplace. you are likely to find Bicycle in/at/on Lab. 
you are likely to find Carpet in/at/on Hotel. 
Scientist --AtLocation--> Laboratory --IsA--> Workplace <--IsA-- Lab <--AtLocation-- Bicycle 
Carpet --AtLocation--> Hotel 