you are likely to find Restaurant in/at/on Mall. you are likely to find Corn in/at/on Restaurant. 
Ambitious is etymologically related to Ambition. Working requires Ambition. Working requires Energy. 
Mall <--AtLocation-- Restaurant <--AtLocation-- Corn 
Ambitious --EtymologicallyRelatedTo--> Ambition <--HasPrerequisite-- Working --HasPrerequisite--> Energy 