Social is related to Party. Party is related to Fair. Fair is a type of Join. Join is the opposite of Opt. 
Dip is a type of Decline. Dip is a type of Angle. 
Social <--RelatedTo--> Party <--RelatedTo--> Fair --IsA--> Join <--Antonym--> Opt 
Decline <--IsA-- Dip --IsA--> Angle 