selecting photos, finding first pairs / sorting

We received about 350 photos from all over the world. For realizing this project we had to sort trough the works and it was not an easy choice which ones to use and which not.
There were a lot of works showing similarities: similar objects or similar topics or both and also sometimes similar composition. Some of those we used for collages, which gave us the opportunity to “save” more pictures. We printed all the photos and started to find pairs of images. With a set of those pairs we started editing and when missing something that fits, we went back and looked trough the so far unused photos.