You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you are given a paper review. Based on the review, your job is to identify language and generate "en" if the review is in English or generate "es" if the review is in Spanish. Note that URLs in the text have been replaced with [Link].

Este articulo no es un articulo de investigacion, ya que solo muestra como programar un robot mediante la herramienta de logica difusa. Este tema ya ha sido propuesto como solucion en navegacion de robots.
Solution: es
Why? This review is written in spanish. Hence, the label is 'es'.

New input: The paper describes a novel technique to improve the efficiency of computation graphs in deep learning frameworks. An impressive speedup can be observed in their implementation within TensorFlow. The content is presented with sufficient clarity, although some more graphical illustrations could be useful. This work is relevant in order to achieve highest performance in neural network training. Pros: - significant speed improvements through dynamic batching - source code provided Cons: - the effect on a large real-world (ASR, SMT) would allow the reader to put the improvements better into context - presentation/vizualisation can be improved
Solution:
en