Grandparent is a type of Animal. Animal is related to Insect. 
Warehouse can be used for Storage. Storage is related to Nest. Nest is related to Spit. one thing you do when you Spit is Hit. 
Grandparent --IsA--> Animal <--RelatedTo--> Insect 
Warehouse --UsedFor--> Storage <--RelatedTo--> Nest <--RelatedTo--> Spit --HasSubevent--> Hit 