Document is a type of Writing. Patent is a type of Document. Patent is related to Invention. Invention is related to Innovative. 
Field is related to Space. Space is part of Staff. Staff is related to Company. Company is related to Show. 
Writing <--IsA-- Document <--IsA-- Patent <--RelatedTo--> Invention <--RelatedTo--> Innovative 
Field <--RelatedTo--> Space --PartOf--> Staff <--RelatedTo--> Company <--RelatedTo--> Show 