This is the Problem, the Solution, the Past and the Future

This is the Problem, the Solution, the Past and the Future is a conceptual dataset for machine learning: Visitors of the website of The Photographers’ Gallery were invited to assign all the images available on the website to one of four categories: Problem Solution Past and Future. This assignment process of 29.032 clicks makes it possible to teach computers how to understand images within this set of concepts. You can download the dataset, browse it or read more.