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First provide a summary of the paper, and then address the following criteria: Quality, clarity, originality and significance. This submission describes a novel autoencoder method, that uses unsupervised learning to configure a recurrent network to encode both the current and past states of an input. I am not a mathematician nor machine learning expert, and thus am not qualified to review the work for technical merit. However, I have extensive experience in neural network modeling, and thus appreciate both the objective and purported accomplishments: the ability to train a recurrent network to store input sequences in an efficient manner using non-supervised learning. The authors describe a mechanism that addresses the problem by breaking it into two stages -- autoencoding, and then optimization -- that are carried out over different times scales.