Front is a type of Appearance. Front is related to Positive. 
Leave is the opposite of Attempt. Bid is a type of Attempt. Bid is related to Auction. Auction is a type of Sell. 
Appearance <--IsA-- Front <--RelatedTo--> Positive 
Leave <--Antonym--> Attempt <--IsA-- Bid <--RelatedTo--> Auction --IsA--> Sell 