Father is related to Husband. Husband is related to Dad. 
Swim is related to Lap. Lap is a type of Sound. Sound is related to Barrier. Barrier is a type of Obstacle. 
Father <--RelatedTo--> Husband <--RelatedTo--> Dad 
Swim <--RelatedTo--> Lap --IsA--> Sound <--RelatedTo--> Barrier --IsA--> Obstacle 