Suppose an automobile manufacturing company. In this company the manufacturer builds cars and the manufacturer is the one who builds at least one car. Manufacturer problems licenses to several dealerships. Dealership stocks cars. Manufacturer has signed contracts with different shipment companies to transport their vehicles if they are ordered outside the city or outside the country. But they do not have to transport with shipment companies if they supply it to the customer living in the same city. So many cars may transport through shipment companies or perhaps none if the customer living in the similar city.
Prepare an ERD (Entity/Relationship Diagram) that explains data objects and their relationship and also define the developed ERD in your own words.