Useful is related to Bag. Bag is related to Carry. Carry is a type of Range. Range is a type of Feed. 
Liquid is related to Mud. Mud is related to Nest. 
Useful <--RelatedTo--> Bag <--RelatedTo--> Carry --IsA--> Range --IsA--> Feed 
Liquid <--RelatedTo--> Mud <--RelatedTo--> Nest 