Chair is the opposite of Bed. Bed is related to Night. Night is related to Camp. Camp is related to Installation. 
Relevant is related to Current. Current is related to Electricity. 
Chair <--Antonym--> Bed <--RelatedTo--> Night <--RelatedTo--> Camp <--RelatedTo--> Installation 
Relevant <--RelatedTo--> Current <--RelatedTo--> Electricity 