What is the relationship between 'Airbus' and 'A350' in the context of the input sentence.
Options: stock exchange, manufacturer, director/manager, product/material produced

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