input: [Cookie] Cookie to identify returning visitors [Cookie name(s)] Is_returning [Data stored] The number 1 and no more detail. [Description] This cookie is used on some pages to identify people who have returned to the EDINA website after visiting before. When you visit some pages on the website, this cookie may be set. It stores only one piece of information - the fact that you've visited the website before. This cookie does not identify you personally and is not linked to any other information we store about you. [When does it expire?] 
output: This cookie expires 5 years after your last visit to the EDINA Website.