Finds different files of the same artwork in Wikimedia Commons on stores them in the same category
Uses sklearn library with affinity propagation.
The coordinates in the space are the categories of the files in the category (1 if the file is in the category, 0 if it is not) and also of the parents' categories.
For instance, if file1 is in Category A, of parents Category B and Category D, and file2 is in Category B of parents Category C, the coordinates are: file1: {1, 1, 0, 1} file2: {0, 1, 1, 0}
We use parent categories to catch the incertitude and incompleteness of the Wikimedia Commons category system.