Tax is related to Sales. Sales is a form of Sale. Sale is related to Transaction. Transaction is related to Deposit. 
Slap is related to Cheek. you are likely to find Tongue in/at/on Cheek. 
Tax <--RelatedTo--> Sales --FormOf--> Sale <--RelatedTo--> Transaction <--RelatedTo--> Deposit 
Slap <--RelatedTo--> Cheek <--AtLocation-- Tongue 