Workshop is a type of Course. Course is related to Trail. Trail is related to Experiment. 
Hole is related to Wound. Wound is related to Being. Being is related to Member. 
Workshop --IsA--> Course <--RelatedTo--> Trail <--RelatedTo--> Experiment 
Hole <--RelatedTo--> Wound <--RelatedTo--> Being <--RelatedTo--> Member 