Corn is related to Ingredient. Ingredient is related to Oxygen. 
Reserve is a synonym of Book. Book is related to Write. Write requires Plan. Plan is related to Decision. 
Corn <--RelatedTo--> Ingredient <--RelatedTo--> Oxygen 
Reserve <--Synonym--> Book <--RelatedTo--> Write --HasPrerequisite--> Plan <--RelatedTo--> Decision 