Cell is related to Ear. you are likely to find Ear in/at/on Ground. 
Confusion is related to Mental. Mental is related to Case. Case is related to Cigarette. Cigarette is related to Cancer. 
Cell <--RelatedTo--> Ear --AtLocation--> Ground 
Confusion <--RelatedTo--> Mental <--RelatedTo--> Case <--RelatedTo--> Cigarette <--RelatedTo--> Cancer 