Exhibition is related to Gallery. Gallery is related to Art. Art is related to Performance. Program is a type of Performance. 
Thigh is related to Neck. Neck is related to Target. Target is related to Aim. Aim is related to Gun. 
Exhibition <--RelatedTo--> Gallery <--RelatedTo--> Art <--RelatedTo--> Performance <--IsA-- Program 
Thigh <--RelatedTo--> Neck <--RelatedTo--> Target <--RelatedTo--> Aim <--RelatedTo--> Gun 