Period is part of History. History is related to Accounting. Accounting is a type of Register. Register is related to Join. 
Like is related to Hear. Hear is related to Job. Job is related to Company. Company is related to Others. 
Period --PartOf--> History <--RelatedTo--> Accounting --IsA--> Register <--RelatedTo--> Join 
Like <--RelatedTo--> Hear <--RelatedTo--> Job <--RelatedTo--> Company <--RelatedTo--> Others 