Personal is related to Information. Information wants (to) Free. Free is the opposite of Costly. 
Booth is a type of Table. Table is related to Leg. Leg is related to Big. 
Personal <--RelatedTo--> Information --Desires--> Free <--Antonym--> Costly 
Booth --IsA--> Table <--RelatedTo--> Leg <--RelatedTo--> Big 