Utilize the input text as a context reference, choose the right relationship between Dufry and retail 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.

If we move to a Slide number 10, net sales by channel, Dufry by channel provides an idea about obviously that the most important impact happen in the airport and retail channel were down and reaching around 63.6% in net sales compared with half year 2019.

Answer: industry