Child is related to Toy. Toy is related to Mobile. Mobile is a type of Sculpture. 
Physical is related to Work. Work is related to Animal. Animal is related to Doll. Doll is a different concept from Living. 
Child <--RelatedTo--> Toy <--RelatedTo--> Mobile --IsA--> Sculpture 
Physical <--RelatedTo--> Work <--RelatedTo--> Animal <--RelatedTo--> Doll <--DistinctFrom--> Living 