Below is a creative commons Image from Flickr. In the Caption to the photo is the kind of attribution that a Creative Commons Attribution License calls for when using an image like this from Flickr:

Some Rights Reserved
Sunset and silhouette
When you choose to use a photo or data available under a Creative Commons’ License, you’re giving other people information about their rights to use your copyrighted materials. This means that you should understand what the different licenses mean
Notice that the information on these sites provides Open Data available through licenses that allow people to create something new or useful
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