Guard is related to Beef. Beef is related to Chicken. Chicken is related to Feather. Feather is related to Pillow. 
Quarter is a type of Part. Part is related to Door. Door is related to Panel. 
Guard <--RelatedTo--> Beef <--RelatedTo--> Chicken <--RelatedTo--> Feather <--RelatedTo--> Pillow 
Quarter --IsA--> Part <--RelatedTo--> Door <--RelatedTo--> Panel 