Refer to the input text as context and select the correct relationship between 'Airbus' and 'A350' from the available options.
Options: product/material produced, manufacturer, stock exchange, director/manager

The latest 787 Dreamliner and the Airbus Group SE A350 are hastening the retreat by combining twin-jet economics with composite materials that offer a 20 per cent efficiency saving versus planes far newer than the 747.
product/material produced