The world’s largest bricks-and-mortar retailer has taken aim at e-commerce giant Amazon.com Inc. recently, by rolling out an unlimited shipping service for $50 a year , which is about half what Amazon charges for its Amazon Prime service.
Refer to the input text as context and select the correct relationship between 'Amazon Prime' and 'Amazon' from the available options.
Options: brand, stock exchange, chief executive officer, owned by