a single physical device so for example this is green form but the test images for example might may be taken by the same model for example HTC or iPhone 4 but they were taken by different physical devices is this orange one and so the goal here was to some kind of use assisted predictions in terms of silver labels and probably if it could allow find as some particular features some particular ste facts that are specific for this country to first particle of polish model and the said that is ins ik handle learned for flow from from the