Chief is related to Department. Department is related to Shop. Shop is related to Grocery. 
Date is related to Accompany. Accompany is a type of Travel. Step is a type of Travel. 
Chief <--RelatedTo--> Department <--RelatedTo--> Shop <--RelatedTo--> Grocery 
Date <--RelatedTo--> Accompany --IsA--> Travel <--IsA-- Step 