8. The computer-implemented method of claim 7 , wherein the model comprises a recurrent neural network language model.
8. The computer-implemented method of claim 7 , wherein the model comprises a recurrent neural network language model. 9. The computer-implemented method of claim 8 , wherein generating the recurrent neural network language model comprises skip-gram modeling of the plurality of sequences of item identifiers to identify latent common features between items and tags.