Swim is related to Motion. Motion is related to General. General is related to Move. Move is related to Dance. 
Explore is a type of Diagnose. Diagnose is related to Condition. Condition is related to Stroke. 
Swim <--RelatedTo--> Motion <--RelatedTo--> General <--RelatedTo--> Move <--RelatedTo--> Dance 
Explore --IsA--> Diagnose <--RelatedTo--> Condition <--RelatedTo--> Stroke 