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.
Take context from the input text and decide on the accurate relationship between 'Dufry' and 'retail' from the options provided.
Options: position held, legal form, industry, developer