Question wants (to) Answer. Answer is related to Refuse. Refuse is the opposite of Offer. Offer is related to Communication. 
Politician is related to Minister. Minister is related to Political. Political is related to Congress. Congress is related to Government. 
Question --Desires--> Answer <--RelatedTo--> Refuse <--Antonym--> Offer <--RelatedTo--> Communication 
Politician <--RelatedTo--> Minister <--RelatedTo--> Political <--RelatedTo--> Congress <--RelatedTo--> Government 