A total of 5,920 images were manually selected from websites (e.g. Flickr Pixabay) with free copyright.

Could you list the licenses of each individual image and where they are from exactly? I checked a few images, but could not find where it says "free copyright", whatever that means.

• 000056.jpg https://www.flickr.com/photos/193480849@N05/51323576150/ "All rights reserved"
• 000111.jpg https://www.flickr.com/photos/mikehousephotography/51289703416/ "All rights reserved"
• 001539.jpg https://www.flickr.com/photos/pjvmartinsphotography/51867151692/ "All rights reserved" (Not exactly the same photo, but I think it is also there somewhere)