Instructions: 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].
Input: This is an interesting article, present develop of a mobile robot use as beach cleaner. I have 2 comments about the design, I think will be interesting define what is the dimension of collector and storage compartment for know what is the capacity of this cleaner. In page 2 in the first paragraph a typo mistake was found.
Output:
en