Definition: 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].

Positive Example 1 -
Input: Este artículo no es un artículo de investigación, ya que sólo muestra cómo programar un robot mediante la herramienta de lógica difusa. Este tema ya ha sido propuesto como solución en navegación de robots.
Output: es

Positive Example 2 -
Input: I don't think the work reported in this paper is suitable for the SCCC conference. The author should consider reporting this experience on a conference more focused on practice in computer engineering than in CS reserarch. The material presented in the paper could be of interest for practicioners working with Oracle, namely a particular product.
Output: en

Negative Example 1 -
Input: Este artículo no es un artículo de investigación, ya que sólo muestra cómo programar un robot mediante la herramienta de lógica difusa. Este tema ya ha sido propuesto como solución en navegación de robots.
Output: en

Negative Example 2 -
Input: I don't think the work reported in this paper is suitable for the SCCC conference. The author should consider reporting this experience on a conference more focused on practice in computer engineering than in CS reserarch. The material presented in the paper could be of interest for practicioners working with Oracle, namely a particular product.
Output: es

Now complete the following example -
Input: This paper proposes a novel approach ParMAC, a parallel and distributed framework of MAC (the Method of Auxiliary Coordinates) to learn nested and non-convex models which is based on the composition of multiple processing layers (i.e., deep nets). The basic idea of MAC to optimise the nested objective function, which is traditionally learned using methods based on the chain-rule gradients but inconvenient and is hard to parallelise, is to break nested functional relationships judiciously by introducing new variables ( the auxiliary coordinates) as equality constraints, and then to optimise a penalised function using alternating optimisation over the original parameters (W step) and over the coordinates (Z step).  The minimisation (W step) updates the parameters by splitting the nested model into independent submodels and training them using existing algorithms, and the coordination (Z step) ensures that corresponding inputs and outputs of submodels eventually match.  In this paper, the basic assumptions of ParMAC are that with large datasets in distributed systems, it is imperative to minimise data movement over the network because of the communication time generally far exceeds the computation time in modern architectures. Thus, the authors propose the ParMAC to translate the parallelism inherent in MAC into a distributed system by data parallelism and model parallelism. They also analyse its parallel speedup and convergence, and demonstrated it with MPI-based implementation to optimise binary autoencoders. The proposed ParMAC is tested on 3 colour image retrieval datasets.   The organization of the paper is well written, and the presentation is clear. My questions are included in the following: - The MAC framework solves the original problem approximately. If people use the sigmoid function to smooth the stepwise function, the naive optimization methods can be easier applied. What is the difference between these two? Or why do we want to use a new approach to solve it? - The authors do not compare their ParMAC model with other distributed approaches for the same nested function optimization problem.
Output: 

 en