Utilize the input text as a context reference, choose the right relationship between Airbus and aircraft from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

In 2014, Airbus spent about 13 billion euros on parts for its A320 family of jets, which compete with Boeing's 737 in the busiest part of the $120 billion-a-year aircraft market.

Answer: product_or_material_produced