What is the relationship between Airbus and aircraft in the context of the input sentence. Choose an answer from: 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.

The airline had placed a firm order with plane maker Airbus SAS for 100 A320 aircraft in June 2005, all of which were delivered by 3 November 2014, two years ahead of scheduled.

Answer: product_or_material_produced