def e_LRP(model, input, input_column=None, output_column=None):
    """
    Returns attributions for a model against an input using the epsilon-LRP (Layer-wise 
    relevance propagation) method which is described in Zeiler et al. 
    (https://arxiv.org/abs/1311.2901)

    The first dimension of input and output is assumed to be the batch dimension.
    """
    pass
