Creature is related to Small. Small is related to Grass. Grass is related to Ground. Ground is related to Yard. 
Girl is related to Skirt. Skirt is related to Bottom. Bottom is related to Neck. Neck is a type of Pet. 
Creature <--RelatedTo--> Small <--RelatedTo--> Grass <--RelatedTo--> Ground <--RelatedTo--> Yard 
Girl <--RelatedTo--> Skirt <--RelatedTo--> Bottom <--RelatedTo--> Neck --IsA--> Pet 