Phone is related to Instrument. Instrument is related to Weapon. Weapon can be used for Competition. Competition is the opposite of Cooperation. 
Gentleman is related to Person. Author is a type of Person. 
Phone <--RelatedTo--> Instrument <--RelatedTo--> Weapon --UsedFor--> Competition <--Antonym--> Cooperation 
Gentleman <--RelatedTo--> Person <--IsA-- Author 