Refer to the input text as context and select the correct relationship between 'Airbus' and 'aircraft' from the available options.
Options: product/material produced, chief executive officer, chairperson, headquarters location

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.
product/material produced