Brother is related to Face. Face is related to Jaw. Jaw is related to Boy. Boy is related to Gender. 
Motor is related to Boat. Boat is related to Captain. Captain is related to Army. Army is related to Troop. 
Brother <--RelatedTo--> Face <--RelatedTo--> Jaw <--RelatedTo--> Boy <--RelatedTo--> Gender 
Motor <--RelatedTo--> Boat <--RelatedTo--> Captain <--RelatedTo--> Army <--RelatedTo--> Troop 