Boat is related to Slip. Slip is the opposite of Stand. Stand is related to Cross. Cross is related to Related. 
Officer is related to Doctor. Doctor is related to People. People is related to Fight. 
Boat <--RelatedTo--> Slip <--Antonym--> Stand <--RelatedTo--> Cross <--RelatedTo--> Related 
Officer <--RelatedTo--> Doctor <--RelatedTo--> People <--RelatedTo--> Fight 